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Ajouter le résultat dans votre panierA multiphysic dynamic 1-D model of a proton-exchange-membrane fuel-cell stack for real-time simulation / Fei Gao in IEEE transactions on industrial electronics, Vol. 57 N° 6 (Juin 2010)
Titre : A multiphysic dynamic 1-D model of a proton-exchange-membrane fuel-cell stack for real-time simulation Type de document : texte imprimé Auteurs : Fei Gao, Auteur ; Blunier, Benjamin, Auteur ; Miraoui, Aabdellatif, Auteur Article en page(s) : pp. 1853 - 1864 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Design methodology Energy conversion Fuell cells Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents cell-layer-scale multidomain dynamic 1-D proton-exchange-membrane fuel-cell (PEMFC) stack model using VHDL-AMS modeling language. The model covers three main fuel-cell energy domains: electrical, fluidic, and thermal. The performance and advantages of the VHDL-AMS language are shown in the first part. Then, by means of the ¿top-down¿ modeling approach, the electrical-, fluidic-, and thermal-domain models of the PEMFC stack are addressed in three separate parts. Simulation results are then compared with a Ballard 1.2-kW NEXA fuel-cell system and show a great agreement with experimental data. This complex multidomain VHDL-AMS stack model, containing more than 25 000 state variables and only few empirical coefficients (four parameters identified on the polarization curve), can be used for fuel-cell system components design and also for real-time applications. Real-time simulation is a key issue in many applications such as system control and hardware-in-the-loop applications. Moreover, this fuel-cell stack model is suitable and can be parameterized for all kinds of PEMFC including water-cooled and metal bipolar plates stacks: Only the cooling fluid and materials properties have to be changed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895331
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1853 - 1864[article] A multiphysic dynamic 1-D model of a proton-exchange-membrane fuel-cell stack for real-time simulation [texte imprimé] / Fei Gao, Auteur ; Blunier, Benjamin, Auteur ; Miraoui, Aabdellatif, Auteur . - pp. 1853 - 1864.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1853 - 1864
Mots-clés : Design methodology Energy conversion Fuell cells Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents cell-layer-scale multidomain dynamic 1-D proton-exchange-membrane fuel-cell (PEMFC) stack model using VHDL-AMS modeling language. The model covers three main fuel-cell energy domains: electrical, fluidic, and thermal. The performance and advantages of the VHDL-AMS language are shown in the first part. Then, by means of the ¿top-down¿ modeling approach, the electrical-, fluidic-, and thermal-domain models of the PEMFC stack are addressed in three separate parts. Simulation results are then compared with a Ballard 1.2-kW NEXA fuel-cell system and show a great agreement with experimental data. This complex multidomain VHDL-AMS stack model, containing more than 25 000 state variables and only few empirical coefficients (four parameters identified on the polarization curve), can be used for fuel-cell system components design and also for real-time applications. Real-time simulation is a key issue in many applications such as system control and hardware-in-the-loop applications. Moreover, this fuel-cell stack model is suitable and can be parameterized for all kinds of PEMFC including water-cooled and metal bipolar plates stacks: Only the cooling fluid and materials properties have to be changed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895331 Exemplaires
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Titre : A dynamic circuit model of a small direct methanol fuel cell for portable electronic devices Type de document : texte imprimé Auteurs : Guarnieri, Massimo, Auteur ; Di Noto, Vito, Auteur ; Moro, Federico, Auteur Article en page(s) : pp. 1865 - 1873 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Battery Coupled problem Equivalent circuit Fuel cell Methanol Nonlinear Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Direct methanol fuel cells (DMFCs) constitute nowadays a promising alternative to lithium ion batteries for powering portable devices. The effective design of power-management units for interfacing DMFCs requires accurate models able to account for variable-load conditions and fuel consumption. A dynamic nonlinear circuit model for passive methanol fuel cells is presented in this paper. The model takes into account mass transport, current generation, electronic and protonic conduction, methanol adsorption, and electrochemical kinetics. Adsorption and oxidation rates, which mostly affect the cell dynamics, are modeled by a detailed two-step reaction mechanism. The fully coupled multiphysics equivalent circuit is solved by assembling first-order differential equations into a nonlinear state-variable system in order to simulate the electrical evolution of the fuel cell from its initial conditions. The fuel-cell discharge and methanol consumption are computed by combining mass-transport and conservation equations. As a result, the runtime of a DMFC can be predicted from the current load and the initial methanol concentration. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5175406
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1865 - 1873[article] A dynamic circuit model of a small direct methanol fuel cell for portable electronic devices [texte imprimé] / Guarnieri, Massimo, Auteur ; Di Noto, Vito, Auteur ; Moro, Federico, Auteur . - pp. 1865 - 1873.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1865 - 1873
Mots-clés : Battery Coupled problem Equivalent circuit Fuel cell Methanol Nonlinear Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Direct methanol fuel cells (DMFCs) constitute nowadays a promising alternative to lithium ion batteries for powering portable devices. The effective design of power-management units for interfacing DMFCs requires accurate models able to account for variable-load conditions and fuel consumption. A dynamic nonlinear circuit model for passive methanol fuel cells is presented in this paper. The model takes into account mass transport, current generation, electronic and protonic conduction, methanol adsorption, and electrochemical kinetics. Adsorption and oxidation rates, which mostly affect the cell dynamics, are modeled by a detailed two-step reaction mechanism. The fully coupled multiphysics equivalent circuit is solved by assembling first-order differential equations into a nonlinear state-variable system in order to simulate the electrical evolution of the fuel cell from its initial conditions. The fuel-cell discharge and methanol consumption are computed by combining mass-transport and conservation equations. As a result, the runtime of a DMFC can be predicted from the current load and the initial methanol concentration. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5175406 Exemplaires
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Titre : A large-signal and dynamic circuit model of a H2/O2 PEM fuel cell: description, parameter identification, and exploitation Type de document : texte imprimé Auteurs : Fontes, Guillaume, Auteur ; Turpin, Christophe, Auteur ; Astier, Stéphan, Auteur Article en page(s) : pp. 1874 - 1881 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Dynamic interactions Experimental characterization Modeling Power converters Proton exchange membrane fuel cell (PEMFC) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The authors propose a large-signal and dynamic circuit model for a proton exchange membrane fuel cell, which includes the following different main physical and chemical phenomena: activation, electrochemical double layer, gas diffusion through the gas diffusion and active layers, and ohmic losses. Be careful: this is not an impedance model. This model will be used in studying the interactions between fuel cells and power converters which are connected and, particularly, the fuel-cell behavior facing the perturbations created by the buck converter and the single-phase inverter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5427018
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1874 - 1881[article] A large-signal and dynamic circuit model of a H2/O2 PEM fuel cell: description, parameter identification, and exploitation [texte imprimé] / Fontes, Guillaume, Auteur ; Turpin, Christophe, Auteur ; Astier, Stéphan, Auteur . - pp. 1874 - 1881.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1874 - 1881
Mots-clés : Dynamic interactions Experimental characterization Modeling Power converters Proton exchange membrane fuel cell (PEMFC) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The authors propose a large-signal and dynamic circuit model for a proton exchange membrane fuel cell, which includes the following different main physical and chemical phenomena: activation, electrochemical double layer, gas diffusion through the gas diffusion and active layers, and ohmic losses. Be careful: this is not an impedance model. This model will be used in studying the interactions between fuel cells and power converters which are connected and, particularly, the fuel-cell behavior facing the perturbations created by the buck converter and the single-phase inverter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5427018 Exemplaires
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Titre : From modeling to control of a PEM fuel cell using energetic macroscopic representation Type de document : texte imprimé Auteurs : Boulon, Loïc, Auteur ; Daniel Hissel, Auteur ; Bouscayrol, Alain, Auteur Article en page(s) : pp. 1882 - 1891 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Control Energetic macroscopic representation (EMR) Fuel cell (FC) Modeling Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a methodology to design the control part of a proton exchange membrane fuel cell (FC) stack. The objective is to control the FC voltage. This methodology is based on an energetic macroscopic representation (EMR) of the FC and leads to a so-called maximal control structure (MCS). The MCS is a step-by-step inversion of the EMR (inversion-model-based control structure). The control design process is based on an explicit definition of the problem. Basically, for instance, the tuning inputs, the system objectives, or constraints are highlighted to organize the control. Moreover, the MCS shows the places where sensors are required and controllers are requested. Unfortunately, the MCS is only a theoretical control structure. Consequently, a realistic structure needs some simplifications, leading to a so-called practical control structure. The FC model is first presented and experimentally validated. The designed control structure is then simulated, and the results are discussed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5166485
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1882 - 1891[article] From modeling to control of a PEM fuel cell using energetic macroscopic representation [texte imprimé] / Boulon, Loïc, Auteur ; Daniel Hissel, Auteur ; Bouscayrol, Alain, Auteur . - pp. 1882 - 1891.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1882 - 1891
Mots-clés : Control Energetic macroscopic representation (EMR) Fuel cell (FC) Modeling Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a methodology to design the control part of a proton exchange membrane fuel cell (FC) stack. The objective is to control the FC voltage. This methodology is based on an energetic macroscopic representation (EMR) of the FC and leads to a so-called maximal control structure (MCS). The MCS is a step-by-step inversion of the EMR (inversion-model-based control structure). The control design process is based on an explicit definition of the problem. Basically, for instance, the tuning inputs, the system objectives, or constraints are highlighted to organize the control. Moreover, the MCS shows the places where sensors are required and controllers are requested. Unfortunately, the MCS is only a theoretical control structure. Consequently, a realistic structure needs some simplifications, leading to a so-called practical control structure. The FC model is first presented and experimentally validated. The designed control structure is then simulated, and the results are discussed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5166485 Exemplaires
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Titre : Real-time implementation of a constrained MPC for efficient airflow control in a PEM fuel cell Type de document : texte imprimé Auteurs : Arce, Alicia, Auteur ; del Real, Alejandro J., Auteur ; Bordons, Carlos, Auteur Article en page(s) : pp. 1892 - 1905 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Air-supply management Explicit model predictive control (MPC) Fuel cell Maximum efficiency Oxygen starvation Polymer electrolyte membrane or proton exchange (PEM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Fuel cells represent an area of great industrial interest due to the possibility to generate clean energy for stationary and automotive applications. It is clear that the proper performance of these devices is closely related to the kind of control that is used; therefore, a study of improved control alternatives is fully justified. The air-supply control is widely used to guarantee safety and to achieve a high performance. This paper deals with this control loop, proposing and comparing two control objectives aimed at satisfying the oxygen starvation avoidance criterion and the maximum efficiency criterion, respectively. The control architecture is based on a constrained explicit model predictive control (MPC) law suitable for real-time implementation due to its low computational demands. The proposed controller is implemented and evaluated on a 1.2-kW polymer electrolyte membrane or proton exchange membrane fuel-cell test bench, thus obtaining real data which show that the maximum efficiency criterion does not conflict with the starvation avoidance criterion and allows system performance improvements of up to 3.46%. Moreover, experimental results utilizing the explicit MPC approach also show improved transient responses compared to those of the manufacturer's control law. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208381
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1892 - 1905[article] Real-time implementation of a constrained MPC for efficient airflow control in a PEM fuel cell [texte imprimé] / Arce, Alicia, Auteur ; del Real, Alejandro J., Auteur ; Bordons, Carlos, Auteur . - pp. 1892 - 1905.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1892 - 1905
Mots-clés : Air-supply management Explicit model predictive control (MPC) Fuel cell Maximum efficiency Oxygen starvation Polymer electrolyte membrane or proton exchange (PEM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Fuel cells represent an area of great industrial interest due to the possibility to generate clean energy for stationary and automotive applications. It is clear that the proper performance of these devices is closely related to the kind of control that is used; therefore, a study of improved control alternatives is fully justified. The air-supply control is widely used to guarantee safety and to achieve a high performance. This paper deals with this control loop, proposing and comparing two control objectives aimed at satisfying the oxygen starvation avoidance criterion and the maximum efficiency criterion, respectively. The control architecture is based on a constrained explicit model predictive control (MPC) law suitable for real-time implementation due to its low computational demands. The proposed controller is implemented and evaluated on a 1.2-kW polymer electrolyte membrane or proton exchange membrane fuel-cell test bench, thus obtaining real data which show that the maximum efficiency criterion does not conflict with the starvation avoidance criterion and allows system performance improvements of up to 3.46%. Moreover, experimental results utilizing the explicit MPC approach also show improved transient responses compared to those of the manufacturer's control law. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208381 Exemplaires
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Titre : Experimental validation of a PEM fuel-cell reduced-order model and a moto-compressor higher order sliding-mode control Type de document : texte imprimé Auteurs : Talj, Reine J., Auteur ; Daniel Hissel, Auteur ; Romeo Ortega, Auteur Article en page(s) : pp. 1906 - 1913 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Control Modeling Proton exchange membrane (PEM) fuel cell Sliding mode Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Fuel cells are electrochemical devices that convert the chemical energy of a gaseous fuel directly into electricity. They are widely regarded as potential future stationary and mobile power sources. The response of a fuel-cell system depends on the air and hydrogen feed, flow and pressure regulation, and heat and water management. In this paper, the study is concentrated on the air subsystem that feeds the fuel-cell cathode with oxygen. Proceeding from a fourth-order model representing the air subsystem of a proton exchange membrane (PEM) fuel cell, a reduced third-order model is presented. Simulations show that the relative error caused by this reduction does not exceed 5%. Experimental validation has been done on a 33-kW PEM fuel cell, for both fourth- and reduced third-order models with less than 5% relative error. Additionally, a higher order sliding-mode supertwisting algorithm, with a well-known heuristic modification using variable gains, has been designed and validated experimentally to control a permanent-magnet synchronous motor that drives a volumetric compressor (double screw) designed to feed the 33-kW fuel cell with air. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210163
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1906 - 1913[article] Experimental validation of a PEM fuel-cell reduced-order model and a moto-compressor higher order sliding-mode control [texte imprimé] / Talj, Reine J., Auteur ; Daniel Hissel, Auteur ; Romeo Ortega, Auteur . - pp. 1906 - 1913.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1906 - 1913
Mots-clés : Control Modeling Proton exchange membrane (PEM) fuel cell Sliding mode Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Fuel cells are electrochemical devices that convert the chemical energy of a gaseous fuel directly into electricity. They are widely regarded as potential future stationary and mobile power sources. The response of a fuel-cell system depends on the air and hydrogen feed, flow and pressure regulation, and heat and water management. In this paper, the study is concentrated on the air subsystem that feeds the fuel-cell cathode with oxygen. Proceeding from a fourth-order model representing the air subsystem of a proton exchange membrane (PEM) fuel cell, a reduced third-order model is presented. Simulations show that the relative error caused by this reduction does not exceed 5%. Experimental validation has been done on a 33-kW PEM fuel cell, for both fourth- and reduced third-order models with less than 5% relative error. Additionally, a higher order sliding-mode supertwisting algorithm, with a well-known heuristic modification using variable gains, has been designed and validated experimentally to control a permanent-magnet synchronous motor that drives a volumetric compressor (double screw) designed to feed the 33-kW fuel cell with air. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210163 Exemplaires
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Titre : A PEM fuel-cell model featuring oxygen-excess-ratio estimation and power-electronics interaction Type de document : texte imprimé Auteurs : Ramos-Paja, Carlos Andrés, Auteur ; Giral, Roberto, Auteur ; Martinez-Salamero, Luis, Auteur Article en page(s) : pp. 1914 - 1924 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Oxygen excess ratio Polymerelectrolyte-membrane (PEM) fuel-cell (FC) modeling Power-electronics simulation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a polymer-electrolyte-membrane fuel-cell (FC) model that is useful for simulation and control purposes is presented. The model uses both electrical-circuit components and functional blocks to reproduce both static and dynamic FC behaviors. Its main feature is in the reproduction of the oxygen-excess-ratio behavior, but it is also able to interact with any electrical device connected at the FC terminals, e.g., a load or a switching converter. Consequently, the proposed model can be used to develop new control strategies aimed at avoiding the oxygen-starvation effect and/or minimizing the fuel consumption. The model has been customized for a Ballard Nexa 1.2-kW power system, and this has allowed an experimental validation by means of measurements performed on a real FC device. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5153315
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1914 - 1924[article] A PEM fuel-cell model featuring oxygen-excess-ratio estimation and power-electronics interaction [texte imprimé] / Ramos-Paja, Carlos Andrés, Auteur ; Giral, Roberto, Auteur ; Martinez-Salamero, Luis, Auteur . - pp. 1914 - 1924.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1914 - 1924
Mots-clés : Oxygen excess ratio Polymerelectrolyte-membrane (PEM) fuel-cell (FC) modeling Power-electronics simulation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a polymer-electrolyte-membrane fuel-cell (FC) model that is useful for simulation and control purposes is presented. The model uses both electrical-circuit components and functional blocks to reproduce both static and dynamic FC behaviors. Its main feature is in the reproduction of the oxygen-excess-ratio behavior, but it is also able to interact with any electrical device connected at the FC terminals, e.g., a load or a switching converter. Consequently, the proposed model can be used to develop new control strategies aimed at avoiding the oxygen-starvation effect and/or minimizing the fuel consumption. The model has been customized for a Ballard Nexa 1.2-kW power system, and this has allowed an experimental validation by means of measurements performed on a real FC device. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5153315 Exemplaires
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Titre : An embedded frequency response analyzer for fuel cell monitoring and characterization Type de document : texte imprimé Auteurs : Ordonez, Martin, Auteur ; Sonnaillon, Maximiliano O., Auteur ; Quaicoe, John E., Auteur Article en page(s) : pp. 1925 - 1934 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Frequency response Fuel cell (FC) Impedance Lock in Monitoring Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents an embedded frequency response analyzer for fuel cells (FCs) based on a robust measurement technique with simple implementation. A frequency response analysis technique provides valuable information of different electrochemical processes that occur inside the FC. The measurement system is implemented on a low-cost digital signal processor to perform frequency response and impedance tracking. The small-size and low-power consumption allows this special device to be embedded into the FC controller or power conditioning stage. The system is capable of measuring automatically the frequency response of the FC at different operating points, even when the FC is operating with a load. These measurements can be used to characterize the FC at the design stage and to perform online monitoring of the FC state during a continuous operation. The proposed instrument uses the lock-in amplification technique, which allows very accurate and precise measurements even in the presence of high noise levels. The proposed hardware and signal processing technique are described in this paper, including the experimental result of a 1.2-kW proton exchange membrane FC system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196759
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1925 - 1934[article] An embedded frequency response analyzer for fuel cell monitoring and characterization [texte imprimé] / Ordonez, Martin, Auteur ; Sonnaillon, Maximiliano O., Auteur ; Quaicoe, John E., Auteur . - pp. 1925 - 1934.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1925 - 1934
Mots-clés : Frequency response Fuel cell (FC) Impedance Lock in Monitoring Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents an embedded frequency response analyzer for fuel cells (FCs) based on a robust measurement technique with simple implementation. A frequency response analysis technique provides valuable information of different electrochemical processes that occur inside the FC. The measurement system is implemented on a low-cost digital signal processor to perform frequency response and impedance tracking. The small-size and low-power consumption allows this special device to be embedded into the FC controller or power conditioning stage. The system is capable of measuring automatically the frequency response of the FC at different operating points, even when the FC is operating with a load. These measurements can be used to characterize the FC at the design stage and to perform online monitoring of the FC state during a continuous operation. The proposed instrument uses the lock-in amplification technique, which allows very accurate and precise measurements even in the presence of high noise levels. The proposed hardware and signal processing technique are described in this paper, including the experimental result of a 1.2-kW proton exchange membrane FC system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196759 Exemplaires
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Titre : Design of the dynamic power compensation for PEMFC distributed power system Type de document : texte imprimé Auteurs : Xuancai, Zhu, Auteur ; Li, Xiao, Auteur ; Guoqiao, Shen, Auteur Article en page(s) : pp. 1935 - 1944 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Bidirectional converter Dynamic power compensation Fuel cell (FC) Supercapacitor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Transient load power may bring damage to the proton exchange membrane fuel cell (PEMFC) and shorten the lifetime of the stack. This paper introduces a dynamic power compensation unit consisting of a bidirectional dc/dc converter and a supercapacitor pack, used for compensating the slow dynamic response of the PEMFC and guaranteeing the operation safety of the fuel cell (FC) during load transitions. In this paper, the characteristics of PEMFC are first studied by an experiment, and then, the target of the dynamic power compensation is set based on the experimental results. Subsequently, an analysis on the dynamic power compensation and derivation of the design target is presented. The controller and the filter design based on these analyses are given. With regard to the hardware realization, the bidirectional dc/dc converter is then introduced. Finally, the experimental results on a 5-kW FC power system with dynamic power compensation are given to verify the theoretical analysis and the design. With the dynamic power compensation unit, the FC only needs to supply a slowly changing output power during the sharp load transition process. A more reliable operation condition can be achieved for the FC. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409589
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1935 - 1944[article] Design of the dynamic power compensation for PEMFC distributed power system [texte imprimé] / Xuancai, Zhu, Auteur ; Li, Xiao, Auteur ; Guoqiao, Shen, Auteur . - pp. 1935 - 1944.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1935 - 1944
Mots-clés : Bidirectional converter Dynamic power compensation Fuel cell (FC) Supercapacitor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Transient load power may bring damage to the proton exchange membrane fuel cell (PEMFC) and shorten the lifetime of the stack. This paper introduces a dynamic power compensation unit consisting of a bidirectional dc/dc converter and a supercapacitor pack, used for compensating the slow dynamic response of the PEMFC and guaranteeing the operation safety of the fuel cell (FC) during load transitions. In this paper, the characteristics of PEMFC are first studied by an experiment, and then, the target of the dynamic power compensation is set based on the experimental results. Subsequently, an analysis on the dynamic power compensation and derivation of the design target is presented. The controller and the filter design based on these analyses are given. With regard to the hardware realization, the bidirectional dc/dc converter is then introduced. Finally, the experimental results on a 5-kW FC power system with dynamic power compensation are given to verify the theoretical analysis and the design. With the dynamic power compensation unit, the FC only needs to supply a slowly changing output power during the sharp load transition process. A more reliable operation condition can be achieved for the FC. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409589 Exemplaires
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Titre : Electrical characteristic study of a hybrid PEMFC and ultracapacitor system Type de document : texte imprimé Auteurs : Junbo, Jia, Auteur ; Gucheng, Wang, Auteur ; Yew, Thean Cham, Auteur Article en page(s) : pp. 1945 - 1953 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Characteristics Electric vehicle (EV) Proton exchange membrane fuel cell (PEMFC) Ultracapacitor (UC) Voltage response Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents the characteristic study of a clean hybrid power supply system combining proton exchange membrane fuel cell (PEMFC) as the main power source and ultracapacitor (UC) as the energy storage unit. Unlike the conventional fuel-cell hybrid system with power conditioning unit, the study investigated the electrical characteristic of the PEMFC and UC hybrid system without dc/dc converter. As a platform to evaluate the proposed system, the fuel-cell-based electric bicycle is implemented. The platform consists of PEMFC stack, metal hydride, thermal balance system, UC, dc motor, system control and data logging unit, as well as user interface. The test results showed that the proposed architecture is functional and leads to good results. By road testing, it was verified that the PEMFC can provide the rated power to the load and that the UC can deliver the power at system startup and the peak power if needed. The road testing results showed that the design objectives are fulfilled. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926179
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1945 - 1953[article] Electrical characteristic study of a hybrid PEMFC and ultracapacitor system [texte imprimé] / Junbo, Jia, Auteur ; Gucheng, Wang, Auteur ; Yew, Thean Cham, Auteur . - pp. 1945 - 1953.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1945 - 1953
Mots-clés : Characteristics Electric vehicle (EV) Proton exchange membrane fuel cell (PEMFC) Ultracapacitor (UC) Voltage response Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents the characteristic study of a clean hybrid power supply system combining proton exchange membrane fuel cell (PEMFC) as the main power source and ultracapacitor (UC) as the energy storage unit. Unlike the conventional fuel-cell hybrid system with power conditioning unit, the study investigated the electrical characteristic of the PEMFC and UC hybrid system without dc/dc converter. As a platform to evaluate the proposed system, the fuel-cell-based electric bicycle is implemented. The platform consists of PEMFC stack, metal hydride, thermal balance system, UC, dc motor, system control and data logging unit, as well as user interface. The test results showed that the proposed architecture is functional and leads to good results. By road testing, it was verified that the PEMFC can provide the rated power to the load and that the UC can deliver the power at system startup and the peak power if needed. The road testing results showed that the design objectives are fulfilled. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926179 Exemplaires
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Titre : Predictive control of voltage and current in a fuel cell–ultracapacitor hybrid Type de document : texte imprimé Auteurs : Greenwell, Wes, Auteur ; Vahidi, Aadalan, Auteur Article en page(s) : pp. 1954 - 1963 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Energy management Fuel cell Model predictive control Ultracapacitor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a system integration and control strategy for managing power transients on a Nexa polymer electrolyte membrane fuel cell (FC) with the assistance of an ultracapacitor (UC) module. The two degrees of freedom provided by the use of two dc/dc converters enable the independent low-level control of dc bus voltage and the current split between the FC and UC. The supervisory-level control objectives are to respond to rapid variations in load while minimizing damaging fluctuations in FC current and maintaining the UC charge (or voltage) within allowable bounds. The use of a model predictive control approach which optimally balances the distribution of power between the FC and UC while satisfying the constraints is shown to be an effective method for meeting the supervisory-level objectives. The results are confirmed in experiments. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5247112
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1954 - 1963[article] Predictive control of voltage and current in a fuel cell–ultracapacitor hybrid [texte imprimé] / Greenwell, Wes, Auteur ; Vahidi, Aadalan, Auteur . - pp. 1954 - 1963.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1954 - 1963
Mots-clés : Energy management Fuel cell Model predictive control Ultracapacitor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a system integration and control strategy for managing power transients on a Nexa polymer electrolyte membrane fuel cell (FC) with the assistance of an ultracapacitor (UC) module. The two degrees of freedom provided by the use of two dc/dc converters enable the independent low-level control of dc bus voltage and the current split between the FC and UC. The supervisory-level control objectives are to respond to rapid variations in load while minimizing damaging fluctuations in FC current and maintaining the UC charge (or voltage) within allowable bounds. The use of a model predictive control approach which optimally balances the distribution of power between the FC and UC while satisfying the constraints is shown to be an effective method for meeting the supervisory-level objectives. The results are confirmed in experiments. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5247112 Exemplaires
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Titre : A methodology for sizing backup fuel-cell/battery hybrid power systems Type de document : texte imprimé Auteurs : Vasallo, Manuel Jesûs, Auteur ; Andujar, José Manuel, Auteur ; Garcia, Covadonga, Auteur Article en page(s) : pp. 1964 - 1975 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Cost saving Decision capabilities Fuel-cell systems Hybrid system Simulation tool Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Hybridization of fuel cells and batteries combines the advantages of both power sources. This paper proposes the use of fuel-cell/battery hybrid power systems as backup power systems and develops a methodology for sizing both fuel cell and battery bank, according to a minimum lifecycle cost criterion, from any defined hourly load profile and any defined backup time. For this purpose, an existing power-system-sizing computer tool has been used, but its initial capabilities have been extended. The developed methodology allows decisions to be taken before any investment is made. As a practical application, the methodology is used for the sizing of a backup power system for a telecommunication system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895326
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1964 - 1975[article] A methodology for sizing backup fuel-cell/battery hybrid power systems [texte imprimé] / Vasallo, Manuel Jesûs, Auteur ; Andujar, José Manuel, Auteur ; Garcia, Covadonga, Auteur . - pp. 1964 - 1975.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1964 - 1975
Mots-clés : Cost saving Decision capabilities Fuel-cell systems Hybrid system Simulation tool Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Hybridization of fuel cells and batteries combines the advantages of both power sources. This paper proposes the use of fuel-cell/battery hybrid power systems as backup power systems and develops a methodology for sizing both fuel cell and battery bank, according to a minimum lifecycle cost criterion, from any defined hourly load profile and any defined backup time. For this purpose, an existing power-system-sizing computer tool has been used, but its initial capabilities have been extended. The developed methodology allows decisions to be taken before any investment is made. As a practical application, the methodology is used for the sizing of a backup power system for a telecommunication system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895326 Exemplaires
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Titre : Three-level bidirectional converter for fuel-cell/battery hybrid power system Type de document : texte imprimé Auteurs : Jin, Ke, Auteur ; Yang, Mengxiong, Auteur ; Ruan, Xinbo, Auteur Article en page(s) : pp. 1976 - 1986 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Battery Bidirectional converter (BDC) Fuel cell (FC) Three-level (3L) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel three-level (3L) bidirectional converter (BDC) is proposed in this paper. Compared with the traditional BDC, the inductor of the 3L BDC can be reduced significantly so that the dynamic response is greatly improved. Hence, the proposed converter is very suitable for fuel-cell/battery hybrid power systems. In addition, the voltage stress on the switch of the proposed converter is only half of the voltage on the high-voltage side, so it is also suitable for high-voltage applications. The operation principle and the implementation of the control circuit are presented in detail. This paper also proposes a novel bidirectional soft-start control strategy for the BDC. A 1-kW prototype converter is built to verify the theoretical analysis. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5229315
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1976 - 1986[article] Three-level bidirectional converter for fuel-cell/battery hybrid power system [texte imprimé] / Jin, Ke, Auteur ; Yang, Mengxiong, Auteur ; Ruan, Xinbo, Auteur . - pp. 1976 - 1986.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1976 - 1986
Mots-clés : Battery Bidirectional converter (BDC) Fuel cell (FC) Three-level (3L) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel three-level (3L) bidirectional converter (BDC) is proposed in this paper. Compared with the traditional BDC, the inductor of the 3L BDC can be reduced significantly so that the dynamic response is greatly improved. Hence, the proposed converter is very suitable for fuel-cell/battery hybrid power systems. In addition, the voltage stress on the switch of the proposed converter is only half of the voltage on the high-voltage side, so it is also suitable for high-voltage applications. The operation principle and the implementation of the control circuit are presented in detail. This paper also proposes a novel bidirectional soft-start control strategy for the BDC. A 1-kW prototype converter is built to verify the theoretical analysis. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5229315 Exemplaires
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Titre : Highly efficient high step-up converter for fuel-cell power processing based on three-state commutation cell Type de document : texte imprimé Auteurs : Araujo, Samuel Vasconcelos, Auteur ; Torrico-Bascope, René P., Auteur ; Torrico-Bascope, Grover V., Auteur Article en page(s) : pp. 1987 - 1997 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : DC-DC Power conversion Fuel cells Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The interest toward the application of fuel cells is increasing in the last years mainly due to the possibility of highly efficient decentralized clean energy generation. The output voltage of fuel-cell stacks is generally below 50 V. Consequently, low-power applications with high output voltage require a high gain for proper operation. Several solutions were so far proposed in the literature, ranging from the use of high-frequency transformers to capacitive multipliers. This paper proposes the modification of a boost converter operating with a three-state commutation cell that is already well suited for high current stress in the input due to the current sharing between the active switches. Here, an additional winding is added to the autotransformer to provide not only the required high gain but also to significantly reduce the voltage stress across the active switches. Moreover, by employing the three-state switching cell, the size of the inductor is reduced because the operating frequency is double of the switching frequency. A prototype for the verification of the circuit was built for a 30-45-V input-voltage range, 400-V output voltage, and 250-W output power. The operation is evaluated, and the experimental waveforms and efficiency curves are presented. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208314
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1987 - 1997[article] Highly efficient high step-up converter for fuel-cell power processing based on three-state commutation cell [texte imprimé] / Araujo, Samuel Vasconcelos, Auteur ; Torrico-Bascope, René P., Auteur ; Torrico-Bascope, Grover V., Auteur . - pp. 1987 - 1997.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1987 - 1997
Mots-clés : DC-DC Power conversion Fuel cells Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The interest toward the application of fuel cells is increasing in the last years mainly due to the possibility of highly efficient decentralized clean energy generation. The output voltage of fuel-cell stacks is generally below 50 V. Consequently, low-power applications with high output voltage require a high gain for proper operation. Several solutions were so far proposed in the literature, ranging from the use of high-frequency transformers to capacitive multipliers. This paper proposes the modification of a boost converter operating with a three-state commutation cell that is already well suited for high current stress in the input due to the current sharing between the active switches. Here, an additional winding is added to the autotransformer to provide not only the required high gain but also to significantly reduce the voltage stress across the active switches. Moreover, by employing the three-state switching cell, the size of the inductor is reduced because the operating frequency is double of the switching frequency. A prototype for the verification of the circuit was built for a 30-45-V input-voltage range, 400-V output voltage, and 250-W output power. The operation is evaluated, and the experimental waveforms and efficiency curves are presented. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208314 Exemplaires
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Titre : A high-efficiency high step-up converter with low switch voltage stress for fuel-cell system applications Type de document : texte imprimé Auteurs : Ching-Tsai Pan, Auteur ; Lai, Ching-Ming, Auteur Article en page(s) : pp. 1998 - 2006 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fuel cell High step-up converter Interleaved control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a novel high step-up converter is proposed for fuel-cell system applications. As an illustration, a two-phase version configuration is given for demonstration. First, an interleaved structure is adapted for reducing input and output ripples. Then, a C¿uk-type converter is integrated to the first phase to achieve a much higher voltage conversion ratio and avoid operating at extreme duty ratio. In addition, additional capacitors are added as voltage dividers for the two phases for reducing the voltage stress of active switches and diodes, which enables one to adopt lower voltage rating devices to further reduce both switching and conduction losses. Furthermore, the corresponding model is also derived, and analysis of the steady-state characteristic is made to show the merits of the proposed converter. Finally, a 200-W rating prototype system is also constructed to verify the effectiveness of the proposed converter. It is seen that an efficiency of 93.3% can be achieved when the output power is 150-W and the output voltage is 200-V with 0.56 duty ratio. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067325
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1998 - 2006[article] A high-efficiency high step-up converter with low switch voltage stress for fuel-cell system applications [texte imprimé] / Ching-Tsai Pan, Auteur ; Lai, Ching-Ming, Auteur . - pp. 1998 - 2006.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 1998 - 2006
Mots-clés : Fuel cell High step-up converter Interleaved control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a novel high step-up converter is proposed for fuel-cell system applications. As an illustration, a two-phase version configuration is given for demonstration. First, an interleaved structure is adapted for reducing input and output ripples. Then, a C¿uk-type converter is integrated to the first phase to achieve a much higher voltage conversion ratio and avoid operating at extreme duty ratio. In addition, additional capacitors are added as voltage dividers for the two phases for reducing the voltage stress of active switches and diodes, which enables one to adopt lower voltage rating devices to further reduce both switching and conduction losses. Furthermore, the corresponding model is also derived, and analysis of the steady-state characteristic is made to show the merits of the proposed converter. Finally, a 200-W rating prototype system is also constructed to verify the effectiveness of the proposed converter. It is seen that an efficiency of 93.3% can be achieved when the output power is 150-W and the output voltage is 200-V with 0.56 duty ratio. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5067325 Exemplaires
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Titre : Novel high step-up DC–DC converter for fuel cell energy conversion system Type de document : texte imprimé Auteurs : Changchien, Shih-Kuen, Auteur ; Liang, Tsorng-Juu, Auteur ; Chen,, Jiann-Fuh, Auteur Article en page(s) : pp. 2007 - 2017 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Coupled inductor Fuel cell High step-up DC-DC converter Leakage Voltage doubler Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel high step-up dc-dc converter for fuel cell energy conversion is presented in this paper. The proposed converter utilizes a multiwinding coupled inductor and a voltage doubler to achieve high step-up voltage gain. The voltage on the active switch is clamped, and the energy stored in the leakage inductor is recycled. Therefore, the voltage stress on the active switch is reduced, and the conversion efficiency is improved. Finally, a 750-W laboratory prototype converter supplied by a proton exchange membrane fuel cell power source and an output voltage of 400 V is implemented. The experimental results verify the performances, including high voltage gain, high conversion efficiency, and the effective suppression of the voltage stress on power devices. The proposed high step-up converter can feasibly be used for low-input-voltage fuel cell power conversion applications. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291789
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2007 - 2017[article] Novel high step-up DC–DC converter for fuel cell energy conversion system [texte imprimé] / Changchien, Shih-Kuen, Auteur ; Liang, Tsorng-Juu, Auteur ; Chen,, Jiann-Fuh, Auteur . - pp. 2007 - 2017.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2007 - 2017
Mots-clés : Coupled inductor Fuel cell High step-up DC-DC converter Leakage Voltage doubler Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A novel high step-up dc-dc converter for fuel cell energy conversion is presented in this paper. The proposed converter utilizes a multiwinding coupled inductor and a voltage doubler to achieve high step-up voltage gain. The voltage on the active switch is clamped, and the energy stored in the leakage inductor is recycled. Therefore, the voltage stress on the active switch is reduced, and the conversion efficiency is improved. Finally, a 750-W laboratory prototype converter supplied by a proton exchange membrane fuel cell power source and an output voltage of 400 V is implemented. The experimental results verify the performances, including high voltage gain, high conversion efficiency, and the effective suppression of the voltage stress on power devices. The proposed high step-up converter can feasibly be used for low-input-voltage fuel cell power conversion applications. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291789 Exemplaires
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Titre : A novel current-fed boost converter with ripple reduction for high-voltage conversion applications Type de document : texte imprimé Auteurs : Leu, Ching-Shan, Auteur ; Li, Ming-Hui, Auteur Article en page(s) : pp. 2018 - 2023 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Boost Current-fed Low current ripple Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Employing a new rectifier circuit, i.e., a novel current-fed boost converter with ripple reduction, is proposed in this paper. It features high conversion ratio with smaller transformer turn ratio, recovery of transformer secondary leakage energy, low voltage stress on the rectifier diodes, and lower input- and output-current ripples with minimum component count. Therefore, high efficiency and power density can be achieved under high-frequency operation. Moreover, the new rectifier circuit can be applied to all current-fed power topologies for high-voltage conversion applications, such as fuel-cell-powered systems. The operating principle, theoretical analysis, and design considerations are presented. To demonstrate its feasibility, a 150-kHz, 16-22-V-input, and 200-V/400-W-output converter is implemented and tested. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5422662
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2018 - 2023[article] A novel current-fed boost converter with ripple reduction for high-voltage conversion applications [texte imprimé] / Leu, Ching-Shan, Auteur ; Li, Ming-Hui, Auteur . - pp. 2018 - 2023.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2018 - 2023
Mots-clés : Boost Current-fed Low current ripple Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Employing a new rectifier circuit, i.e., a novel current-fed boost converter with ripple reduction, is proposed in this paper. It features high conversion ratio with smaller transformer turn ratio, recovery of transformer secondary leakage energy, low voltage stress on the rectifier diodes, and lower input- and output-current ripples with minimum component count. Therefore, high efficiency and power density can be achieved under high-frequency operation. Moreover, the new rectifier circuit can be applied to all current-fed power topologies for high-voltage conversion applications, such as fuel-cell-powered systems. The operating principle, theoretical analysis, and design considerations are presented. To demonstrate its feasibility, a 150-kHz, 16-22-V-input, and 200-V/400-W-output converter is implemented and tested. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5422662 Exemplaires
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Titre : Converter systems for fuel cells in the medium power range : a comparative study Type de document : texte imprimé Auteurs : Mohr, Malte, Auteur ; Franke, Wulf Toke, Auteur ; Wittig, Bjoern, Auteur Article en page(s) : pp. 2024 - 2032 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Current-source inverter (CSI) Dc-dc power conversion Fuel cells Voltage-source (VSI) Z-source Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Inverter systems that feed electrical power from fuel cells into the grid must convert the direct current of the fuel cell into the alternating current of the grid. In addition, these inverters have to adapt the different voltages of the fuel-cell system and the grid to each other. In this paper, different topologies of appropriate inverter systems in the medium power range of 20 kW and higher are presented briefly. The inverter operating behavior, power rating, and efficiency are compared. The power rating and efficiency are compared using an analytical calculation of the semiconductor losses. The study includes transformerless inverters as well as two-stage inverter systems with high-frequency transformers (dc/dc converter combined with an inverter). This paper compares converter systems using insulated-gate bipolar transistors (IGBTs), e.g., a boost converter in series with a voltage-source inverter (VSI), current-source inverter, and z-source inverter or converter systems using superjunction MOSFETs, such as voltage- and current-fed full-bridge converters or a boost converter with an autotransformer. The MOSFET-based dc/dc converters must be connected in series to a VSI with IGBTs to feed into the three-phase grid. The presented converters were tested in the laboratory. Some characteristics of their laboratory performance are shown. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5432955
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2024 - 2032[article] Converter systems for fuel cells in the medium power range : a comparative study [texte imprimé] / Mohr, Malte, Auteur ; Franke, Wulf Toke, Auteur ; Wittig, Bjoern, Auteur . - pp. 2024 - 2032.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2024 - 2032
Mots-clés : Current-source inverter (CSI) Dc-dc power conversion Fuel cells Voltage-source (VSI) Z-source Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Inverter systems that feed electrical power from fuel cells into the grid must convert the direct current of the fuel cell into the alternating current of the grid. In addition, these inverters have to adapt the different voltages of the fuel-cell system and the grid to each other. In this paper, different topologies of appropriate inverter systems in the medium power range of 20 kW and higher are presented briefly. The inverter operating behavior, power rating, and efficiency are compared. The power rating and efficiency are compared using an analytical calculation of the semiconductor losses. The study includes transformerless inverters as well as two-stage inverter systems with high-frequency transformers (dc/dc converter combined with an inverter). This paper compares converter systems using insulated-gate bipolar transistors (IGBTs), e.g., a boost converter in series with a voltage-source inverter (VSI), current-source inverter, and z-source inverter or converter systems using superjunction MOSFETs, such as voltage- and current-fed full-bridge converters or a boost converter with an autotransformer. The MOSFET-based dc/dc converters must be connected in series to a VSI with IGBTs to feed into the three-phase grid. The presented converters were tested in the laboratory. Some characteristics of their laboratory performance are shown. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5432955 Exemplaires
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Titre : A new feedback method for PR current control of LCL-filter-based grid-connected inverter Type de document : texte imprimé Auteurs : Guoqiao, Shen, Auteur ; Xuancai, Zhu, Auteur ; Jun Zhang, Auteur Article en page(s) : pp. 2033 - 2041 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Current control Harmonic distorsion Inverters LCL filter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : For a grid-connected converter with an LCL filter, the harmonic compensators of a proportional-resonant (PR) controller are usually limited to several low-order current harmonics due to system instability when the compensated frequency is out of the bandwidth of the system control loop. In this paper, a new current feedback method for PR current control is proposed. The weighted average value of the currents flowing through the two inductors of the LCL filter is used as the feedback to the current PR regulator. Consequently, the control system with the LCL filter is degraded from a third-order function to a first-order one. A large proportional control-loop gain can be chosen to obtain a wide control-loop bandwidth, and the system can be optimized easily for minimum current harmonic distortions, as well as system stability. The inverter system with the proposed controller is investigated and compared with those using traditional control methods. Experimental results on a 5-kW fuel-cell inverter are provided, and the new current control strategy has been verified. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5406162
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2033 - 2041[article] A new feedback method for PR current control of LCL-filter-based grid-connected inverter [texte imprimé] / Guoqiao, Shen, Auteur ; Xuancai, Zhu, Auteur ; Jun Zhang, Auteur . - pp. 2033 - 2041.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2033 - 2041
Mots-clés : Current control Harmonic distorsion Inverters LCL filter Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : For a grid-connected converter with an LCL filter, the harmonic compensators of a proportional-resonant (PR) controller are usually limited to several low-order current harmonics due to system instability when the compensated frequency is out of the bandwidth of the system control loop. In this paper, a new current feedback method for PR current control is proposed. The weighted average value of the currents flowing through the two inductors of the LCL filter is used as the feedback to the current PR regulator. Consequently, the control system with the LCL filter is degraded from a third-order function to a first-order one. A large proportional control-loop gain can be chosen to obtain a wide control-loop bandwidth, and the system can be optimized easily for minimum current harmonic distortions, as well as system stability. The inverter system with the proposed controller is investigated and compared with those using traditional control methods. Experimental results on a 5-kW fuel-cell inverter are provided, and the new current control strategy has been verified. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5406162 Exemplaires
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Titre : Low-frequency current oscillations and maximum power point tracking in grid-connected fuel-cell-based systems Type de document : texte imprimé Auteurs : Giustiniani, Alessandro, Auteur ; Petrone, Giovanni, Auteur ; Spagnuolo, Giovanni, Auteur Article en page(s) : pp. 2042 - 2053 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fuel cell (FC) Low-frequency ripple rejection Maximum power point (MPP) tracking (MPPT) Single-phase inverter control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The study of a double-stage single-phase inverter for fuel-cell-based applications is proposed in this paper. A novel control strategy aimed at reducing the low-frequency oscillations of the fuel-cell (FC) current in order to guarantee the FC safety operating conditions is proposed. The reduction of such oscillations increases the FC lifetime and avoids high mechanical stress of the membrane and unnecessary consumption of reactants. Furthermore, it allows one to design a strategy for extracting the maximum power from the FC stack with a total control of the concentration losses. Simulation and experimental results confirm the effectiveness of the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290036
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2042 - 2053[article] Low-frequency current oscillations and maximum power point tracking in grid-connected fuel-cell-based systems [texte imprimé] / Giustiniani, Alessandro, Auteur ; Petrone, Giovanni, Auteur ; Spagnuolo, Giovanni, Auteur . - pp. 2042 - 2053.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2042 - 2053
Mots-clés : Fuel cell (FC) Low-frequency ripple rejection Maximum power point (MPP) tracking (MPPT) Single-phase inverter control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The study of a double-stage single-phase inverter for fuel-cell-based applications is proposed in this paper. A novel control strategy aimed at reducing the low-frequency oscillations of the fuel-cell (FC) current in order to guarantee the FC safety operating conditions is proposed. The reduction of such oscillations increases the FC lifetime and avoids high mechanical stress of the membrane and unnecessary consumption of reactants. Furthermore, it allows one to design a strategy for extracting the maximum power from the FC stack with a total control of the concentration losses. Simulation and experimental results confirm the effectiveness of the proposed approach. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290036 Exemplaires
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Titre : New control method including state observer of voltage unbalance for grid voltage-source converters Type de document : texte imprimé Auteurs : Lee, Kevin, Auteur ; Jahns, Thomas M., Auteur ; Lipo, Thomas A., Auteur Article en page(s) : pp. 2054 - 2065 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Disturbance observer Grid voltage-source converters (VSCs) Power quality Voltage unbalance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : New observer-based disturbance-estimation and control algorithms are introduced in this paper that compensate source voltage unbalances. The algorithms are also designed to compensate the detrimental impact of delay effects caused by the digital-signal processing. Consequently, these techniques are appropriate for higher power systems with reduced pulsewidth modulation switching frequency and limited current-controller bandwidth. Analytical, simulation, and experimental results are presented to illustrate the effectiveness of the new observer-based control techniques. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280263
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2054 - 2065[article] New control method including state observer of voltage unbalance for grid voltage-source converters [texte imprimé] / Lee, Kevin, Auteur ; Jahns, Thomas M., Auteur ; Lipo, Thomas A., Auteur . - pp. 2054 - 2065.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2054 - 2065
Mots-clés : Disturbance observer Grid voltage-source converters (VSCs) Power quality Voltage unbalance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : New observer-based disturbance-estimation and control algorithms are introduced in this paper that compensate source voltage unbalances. The algorithms are also designed to compensate the detrimental impact of delay effects caused by the digital-signal processing. Consequently, these techniques are appropriate for higher power systems with reduced pulsewidth modulation switching frequency and limited current-controller bandwidth. Analytical, simulation, and experimental results are presented to illustrate the effectiveness of the new observer-based control techniques. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280263 Exemplaires
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Titre : Multilevel multiphase feedforward space-vector modulation technique Type de document : texte imprimé Auteurs : Leon, José I., Auteur ; Lopez, Oscar, Auteur ; Franquelo, Leopoldo Garcia, Auteur Article en page(s) : pp. 2066 - 2075 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Modulation Multilevel systems Voltage control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Multiphase converters have been applied to an increasing number of industrial applications in recent years. On the other hand, multilevel converters have become a mature technology mainly in medium- and high-power applications. One of the problems of multilevel converters is the dc voltage unbalance of the dc bus. Depending on the loading conditions and the number of levels of the converter, oscillations appear in the dc voltages of the dc link. This paper presents a feedforward modulation technique for multilevel multiphase converters that reduces the distortion under balanced or unbalanced dc conditions. The proposed modulation method can be applied to any multilevel-converter topology with any number of levels and phases. Experimental results are shown in order to validate the proposed feedforward modulation technique. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289978
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2066 - 2075[article] Multilevel multiphase feedforward space-vector modulation technique [texte imprimé] / Leon, José I., Auteur ; Lopez, Oscar, Auteur ; Franquelo, Leopoldo Garcia, Auteur . - pp. 2066 - 2075.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2066 - 2075
Mots-clés : Modulation Multilevel systems Voltage control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Multiphase converters have been applied to an increasing number of industrial applications in recent years. On the other hand, multilevel converters have become a mature technology mainly in medium- and high-power applications. One of the problems of multilevel converters is the dc voltage unbalance of the dc bus. Depending on the loading conditions and the number of levels of the converter, oscillations appear in the dc voltages of the dc link. This paper presents a feedforward modulation technique for multilevel multiphase converters that reduces the distortion under balanced or unbalanced dc conditions. The proposed modulation method can be applied to any multilevel-converter topology with any number of levels and phases. Experimental results are shown in order to validate the proposed feedforward modulation technique. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289978 Exemplaires
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Titre : Control and implementation of a matrix-converter-based AC ground power-supply unit for aircraft servicing Type de document : texte imprimé Auteurs : Lopez Arevalo, Saùl, Auteur ; Zanchetta, Pericle, Auteur ; Wheeler, Patrick W., Auteur Article en page(s) : pp. 2076 - 2084 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Matrix converter Power supplies Repetitive control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the design, control, and implementation of a three-phase ground power-supply unit for aircraft servicing. Instead of a classical back-to-back converter configuration, a three-phase direct ac-ac (matrix) converter has been used as the power conditioning core of the power supply, working in conjunction with input and output LC filters. An optimized control system in the ABC frame employing a repetitive controller has been successfully implemented, taking into account both the transient and steady-state performance targets together with the system effectiveness under extreme unbalanced conditions. Extensive experimental tests on a 7.5-kVA prototype prove the efficiency of the designed system in meeting the high demanding civil and military international standards requirements. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289995
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2076 - 2084[article] Control and implementation of a matrix-converter-based AC ground power-supply unit for aircraft servicing [texte imprimé] / Lopez Arevalo, Saùl, Auteur ; Zanchetta, Pericle, Auteur ; Wheeler, Patrick W., Auteur . - pp. 2076 - 2084.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2076 - 2084
Mots-clés : Matrix converter Power supplies Repetitive control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper deals with the design, control, and implementation of a three-phase ground power-supply unit for aircraft servicing. Instead of a classical back-to-back converter configuration, a three-phase direct ac-ac (matrix) converter has been used as the power conditioning core of the power supply, working in conjunction with input and output LC filters. An optimized control system in the ABC frame employing a repetitive controller has been successfully implemented, taking into account both the transient and steady-state performance targets together with the system effectiveness under extreme unbalanced conditions. Extensive experimental tests on a 7.5-kVA prototype prove the efficiency of the designed system in meeting the high demanding civil and military international standards requirements. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289995 Exemplaires
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Titre : Reduction of torque ripple in induction motor drives using an advanced hybrid PWM technique Type de document : texte imprimé Auteurs : Basu, Kaushik, Auteur ; Prasad, J. S. Siva, Auteur ; G. Narayanan, Auteur Article en page(s) : pp. 2085 - 2091 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Harmonic distorsion Induction motor drives Pulsewidth modulated inverters modulation (PWM) Space vector Switching sequence Torque pulsation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A voltage source inverter-fed induction motor produces a pulsating torque due to application of nonsinusoidal voltages. Torque pulsation is strongly influenced by the pulsewidth modulation (PWM) method employed. Conventional space vector PWM (CSVPWM) is known to result in less torque ripple than sine-triangle PWM. This paper aims at further reduction in the pulsating torque by employing advanced bus-clamping switching sequences, which apply an active vector twice in a subcycle. This paper proposes a hybrid PWM technique which employs such advanced bus-clamping sequences in conjunction with a conventional switching sequence. The proposed hybrid PWM technique is shown to reduce the torque ripple considerably over CSVPWM along with a marginal reduction in current ripple. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290087
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2085 - 2091[article] Reduction of torque ripple in induction motor drives using an advanced hybrid PWM technique [texte imprimé] / Basu, Kaushik, Auteur ; Prasad, J. S. Siva, Auteur ; G. Narayanan, Auteur . - pp. 2085 - 2091.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2085 - 2091
Mots-clés : Harmonic distorsion Induction motor drives Pulsewidth modulated inverters modulation (PWM) Space vector Switching sequence Torque pulsation Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A voltage source inverter-fed induction motor produces a pulsating torque due to application of nonsinusoidal voltages. Torque pulsation is strongly influenced by the pulsewidth modulation (PWM) method employed. Conventional space vector PWM (CSVPWM) is known to result in less torque ripple than sine-triangle PWM. This paper aims at further reduction in the pulsating torque by employing advanced bus-clamping switching sequences, which apply an active vector twice in a subcycle. This paper proposes a hybrid PWM technique which employs such advanced bus-clamping sequences in conjunction with a conventional switching sequence. The proposed hybrid PWM technique is shown to reduce the torque ripple considerably over CSVPWM along with a marginal reduction in current ripple. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290087 Exemplaires
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Titre : Back EMF sensorless-control algorithm for high-dynamic performance PMSM Type de document : texte imprimé Auteurs : Genduso, Fabio, Auteur ; Miceli, Rosario, Auteur ; Rando, Cosimo, Auteur Article en page(s) : pp. 2092 - 2100 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Brushless machines Control equipment Synchronous-motor drives Transducers Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a low-time-consuming and low-cost sensorless-control algorithm for high-dynamic performance permanent-magnet synchronous motors, both surface and internal permanent-magnet mounted for position and speed estimation, is introduced, discussed, and experimentally validated. This control algorithm is based on the estimation of rotor speed and angular position starting from the back electromotive force space-vector determination without voltage sensors by using the reference voltages given by the current controllers instead of the actual ones. This choice obviously introduces some errors that must be vanished by means of a compensating function. The novelties of the proposed estimation algorithm are the position-estimation equation and the process of compensation of the inverter phase lag that also suggests the final mathematical form of the estimation. The mathematical structure of the estimation guarantees a high degree of robustness against parameter variation as shown by the sensitivity analysis reported in this paper. Experimental verifications of the proposed sensorless-control system have been made with the aid of a flexible test bench for brushless motor electrical drives. The test results presented in this paper show the validity of the proposed low-cost sensorless-control algorithm and, above all, underline the high dynamic performances of the sensorless-control system also with a reduced equipment. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289997
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2092 - 2100[article] Back EMF sensorless-control algorithm for high-dynamic performance PMSM [texte imprimé] / Genduso, Fabio, Auteur ; Miceli, Rosario, Auteur ; Rando, Cosimo, Auteur . - pp. 2092 - 2100.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2092 - 2100
Mots-clés : Brushless machines Control equipment Synchronous-motor drives Transducers Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a low-time-consuming and low-cost sensorless-control algorithm for high-dynamic performance permanent-magnet synchronous motors, both surface and internal permanent-magnet mounted for position and speed estimation, is introduced, discussed, and experimentally validated. This control algorithm is based on the estimation of rotor speed and angular position starting from the back electromotive force space-vector determination without voltage sensors by using the reference voltages given by the current controllers instead of the actual ones. This choice obviously introduces some errors that must be vanished by means of a compensating function. The novelties of the proposed estimation algorithm are the position-estimation equation and the process of compensation of the inverter phase lag that also suggests the final mathematical form of the estimation. The mathematical structure of the estimation guarantees a high degree of robustness against parameter variation as shown by the sensitivity analysis reported in this paper. Experimental verifications of the proposed sensorless-control system have been made with the aid of a flexible test bench for brushless motor electrical drives. The test results presented in this paper show the validity of the proposed low-cost sensorless-control algorithm and, above all, underline the high dynamic performances of the sensorless-control system also with a reduced equipment. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289997 Exemplaires
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Titre : Improved waveform quality in the direct torque control of matrix-converter-fed PMSM drives Type de document : texte imprimé Auteurs : Ortega, Carlos, Auteur ; Arias, Antoni, Auteur ; Caruana, Cedric, Auteur Article en page(s) : pp. 2101 - 2110 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Direct torque control (DTC) Matrix converters (MCs) Torque ripple Waveform quality Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Despite the ability of matrix converters (MCs) to generate a higher number of voltage vectors compared with standard voltage-source inverters, most of the applications reported in the literature utilize only those having larger amplitudes. This paper investigates the use of MC input voltages with different amplitudes in order to reduce the inherent torque ripple that appears when direct torque control (DTC) is used to drive ac machines, particularly permanent-magnet synchronous motors, as its stator inductance is typically half of that of an induction machine of similar ratings. Utilizing a wider range of input voltage vectors for the MC, but not using the rotating vectors, a new lookup table that distinguishes between small and large torque errors is developed, leading to an enhanced MC-fed DTC. The enhancement enables a reduction in the electromagnetic torque ripple and output-current total harmonic distortion. Furthermore, the proposed control strategy improves the MC voltage transfer ratio up to 86.6% compared with 50% achieved by the conventional DTC using MCs at the expense, however, of slightly decreasing the input power factor control capability. The proposed enhanced MC DTC was tested experimentally, and results comparing its performance with MC DTC using an adapted lookup table are shown. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5276851
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2101 - 2110[article] Improved waveform quality in the direct torque control of matrix-converter-fed PMSM drives [texte imprimé] / Ortega, Carlos, Auteur ; Arias, Antoni, Auteur ; Caruana, Cedric, Auteur . - pp. 2101 - 2110.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2101 - 2110
Mots-clés : Direct torque control (DTC) Matrix converters (MCs) Torque ripple Waveform quality Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Despite the ability of matrix converters (MCs) to generate a higher number of voltage vectors compared with standard voltage-source inverters, most of the applications reported in the literature utilize only those having larger amplitudes. This paper investigates the use of MC input voltages with different amplitudes in order to reduce the inherent torque ripple that appears when direct torque control (DTC) is used to drive ac machines, particularly permanent-magnet synchronous motors, as its stator inductance is typically half of that of an induction machine of similar ratings. Utilizing a wider range of input voltage vectors for the MC, but not using the rotating vectors, a new lookup table that distinguishes between small and large torque errors is developed, leading to an enhanced MC-fed DTC. The enhancement enables a reduction in the electromagnetic torque ripple and output-current total harmonic distortion. Furthermore, the proposed control strategy improves the MC voltage transfer ratio up to 86.6% compared with 50% achieved by the conventional DTC using MCs at the expense, however, of slightly decreasing the input power factor control capability. The proposed enhanced MC DTC was tested experimentally, and results comparing its performance with MC DTC using an adapted lookup table are shown. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5276851 Exemplaires
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Titre : Multistring five-level inverter with novel PWM control scheme for PV application Type de document : texte imprimé Auteurs : Rahim, Nasrudin Abd, Auteur ; Selvaraj, Jeyraj, Auteur Article en page(s) : pp. 2111 - 2123 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Grid-connected Multilevel inverter Multistring Photovoltaic (PV) Pulsewidth-modulated (PWM) Proportional-integral (PI) current control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase multistring five-level photovoltaic (PV) inverter topology for grid-connected PV systems with a novel pulsewidth-modulated (PWM) control scheme. Three PV strings are cascaded together in parallel configuration and connected to a five-level inverter to produce output voltage in five levels: zero, +1/2V dc, V dc, -1/2V dc, and -V dc. Two reference signals that were identical to each other with an offset that was equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switches. DSP TMS320F2812 is used to implement this PWM switching scheme together with a digital proportional-integral current control algorithm. The inverter offers much less total harmonic distortion and can operate at near-unity power factor. The validity of the proposed inverter is verified through simulation and implemented in a prototype. The experimental results are compared with a conventional single-phase multistring three-level grid-connected PWM inverter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290156
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2111 - 2123[article] Multistring five-level inverter with novel PWM control scheme for PV application [texte imprimé] / Rahim, Nasrudin Abd, Auteur ; Selvaraj, Jeyraj, Auteur . - pp. 2111 - 2123.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2111 - 2123
Mots-clés : Grid-connected Multilevel inverter Multistring Photovoltaic (PV) Pulsewidth-modulated (PWM) Proportional-integral (PI) current control Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-phase multistring five-level photovoltaic (PV) inverter topology for grid-connected PV systems with a novel pulsewidth-modulated (PWM) control scheme. Three PV strings are cascaded together in parallel configuration and connected to a five-level inverter to produce output voltage in five levels: zero, +1/2V dc, V dc, -1/2V dc, and -V dc. Two reference signals that were identical to each other with an offset that was equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switches. DSP TMS320F2812 is used to implement this PWM switching scheme together with a digital proportional-integral current control algorithm. The inverter offers much less total harmonic distortion and can operate at near-unity power factor. The validity of the proposed inverter is verified through simulation and implemented in a prototype. The experimental results are compared with a conventional single-phase multistring three-level grid-connected PWM inverter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290156 Exemplaires
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Titre : A simple nonlinear magnetic analysis for axial-flux permanent-magnet machines Type de document : texte imprimé Auteurs : Kano, Yishiaki, Auteur ; Kosaka, Takashi, Auteur ; Matsui, Nobuyuki, Auteur Article en page(s) : pp. 2124 - 2133 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Axial-flux permanent-magnet (AFPM) machines Equivalent magnetic circuit Simple nonlinear analysis 3-D finite-element (3D-FEA) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a simple nonlinear magnetic analysis for axial-flux permanent-magnet machines as an assistant design tool of 3-D finite-element analysis (3D-FEA). The proposed analysis consists of an equivalent magnetic circuit and an analytical model of air-gap permeances, including saturable permeances in the core. The proposed analysis is capable of calculating the flux distribution and torque characteristics under heavy operating conditions. We verify the accuracy of the proposed analysis by comparing the results with those of 3D-FEA for various design free parameters. After verifying the accuracy of the analysis, we present our analysis-based optimum design, which realizes the maximum torque density while maintaining efficiency at the desired value. Compared to the traditional 3D-FEA, the design method proposed here has the same accuracy, while the computation time is as short as 1/21. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290160
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2124 - 2133[article] A simple nonlinear magnetic analysis for axial-flux permanent-magnet machines [texte imprimé] / Kano, Yishiaki, Auteur ; Kosaka, Takashi, Auteur ; Matsui, Nobuyuki, Auteur . - pp. 2124 - 2133.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2124 - 2133
Mots-clés : Axial-flux permanent-magnet (AFPM) machines Equivalent magnetic circuit Simple nonlinear analysis 3-D finite-element (3D-FEA) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a simple nonlinear magnetic analysis for axial-flux permanent-magnet machines as an assistant design tool of 3-D finite-element analysis (3D-FEA). The proposed analysis consists of an equivalent magnetic circuit and an analytical model of air-gap permeances, including saturable permeances in the core. The proposed analysis is capable of calculating the flux distribution and torque characteristics under heavy operating conditions. We verify the accuracy of the proposed analysis by comparing the results with those of 3D-FEA for various design free parameters. After verifying the accuracy of the analysis, we present our analysis-based optimum design, which realizes the maximum torque density while maintaining efficiency at the desired value. Compared to the traditional 3D-FEA, the design method proposed here has the same accuracy, while the computation time is as short as 1/21. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290160 Exemplaires
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Titre : Remedial brushless AC operation of fault-tolerant doubly salient permanent-magnet motor drives Type de document : texte imprimé Auteurs : Zhao, Wenxiang, Auteur ; Chau, K. T., Auteur ; Ming, Cheng, Auteur Article en page(s) : pp. 2134 - 2141 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Brushless ac (BLAC) dc (BLDC) Cosimulation Fault-tolerant machine Permanent-magnet (PM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The doubly salient permanent-magnet (DSPM) machine is a new class of stator-PM brushless machines, which inherently offers the fault-tolerant feature. In this paper, a new operation strategy is proposed and implemented for fault-tolerant DSPM motor drives. The key is to operate the DSPM motor drive in a remedial brushless ac (BLAC) mode under the open-circuit fault condition, while operating in the conventional brushless dc mode under normal condition. Both cosimulation and experimental results confirm that the proposed remedial BLAC operation can maintain the average torque, reduce the torque ripple, and retain the self-starting capability under the open-circuit fault. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282567
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2134 - 2141[article] Remedial brushless AC operation of fault-tolerant doubly salient permanent-magnet motor drives [texte imprimé] / Zhao, Wenxiang, Auteur ; Chau, K. T., Auteur ; Ming, Cheng, Auteur . - pp. 2134 - 2141.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2134 - 2141
Mots-clés : Brushless ac (BLAC) dc (BLDC) Cosimulation Fault-tolerant machine Permanent-magnet (PM) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The doubly salient permanent-magnet (DSPM) machine is a new class of stator-PM brushless machines, which inherently offers the fault-tolerant feature. In this paper, a new operation strategy is proposed and implemented for fault-tolerant DSPM motor drives. The key is to operate the DSPM motor drive in a remedial brushless ac (BLAC) mode under the open-circuit fault condition, while operating in the conventional brushless dc mode under normal condition. Both cosimulation and experimental results confirm that the proposed remedial BLAC operation can maintain the average torque, reduce the torque ripple, and retain the self-starting capability under the open-circuit fault. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282567 Exemplaires
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Titre : Experimental identification method for small-signal analysis of smart power ICs Type de document : texte imprimé Auteurs : Xu, Hai, Auteur ; Hee Jun Kim, Auteur ; Chung, Won-Sup, Auteur Article en page(s) : pp. 2142 - 2150 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Discrete time systems Integrated circuit (IC) modeling Pulsewidth modulation (PWM) Transfer functions Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Smart power integrated circuits (ICs), as the combination of control and power functions on a single chip, enable the production of more miniaturized systems. This paper presents an experimental method for the small-signal frequency-response analysis of smart power ICs in switch-mode power supplies. In this method, the switching-duty-cycle output of a power IC is converted into a digital signal by using two high-speed counters during each switching period, and the power IC's control input signal is simultaneously converted into a digital signal by an analog-to-digital converter. After processing the data of the duty-cycle output and the control input, not only the transient response but also the frequency response of the power IC can be obtained. Using least square identification, the smart power IC's transfer function is finally synthesized from the measurement data. This analysis method, referred to as sampling the transient responses and frequency responses of power ICs, can efficiently provide reliable and accurate transfer functions whether the switching frequency of a power IC is jittered or frequency modulated. The experiments using different power ICs were presented herein to validate the analysis method. The results were discussed, and the effectiveness and practicality of the method were verified. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290037
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2142 - 2150[article] Experimental identification method for small-signal analysis of smart power ICs [texte imprimé] / Xu, Hai, Auteur ; Hee Jun Kim, Auteur ; Chung, Won-Sup, Auteur . - pp. 2142 - 2150.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2142 - 2150
Mots-clés : Discrete time systems Integrated circuit (IC) modeling Pulsewidth modulation (PWM) Transfer functions Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Smart power integrated circuits (ICs), as the combination of control and power functions on a single chip, enable the production of more miniaturized systems. This paper presents an experimental method for the small-signal frequency-response analysis of smart power ICs in switch-mode power supplies. In this method, the switching-duty-cycle output of a power IC is converted into a digital signal by using two high-speed counters during each switching period, and the power IC's control input signal is simultaneously converted into a digital signal by an analog-to-digital converter. After processing the data of the duty-cycle output and the control input, not only the transient response but also the frequency response of the power IC can be obtained. Using least square identification, the smart power IC's transfer function is finally synthesized from the measurement data. This analysis method, referred to as sampling the transient responses and frequency responses of power ICs, can efficiently provide reliable and accurate transfer functions whether the switching frequency of a power IC is jittered or frequency modulated. The experiments using different power ICs were presented herein to validate the analysis method. The results were discussed, and the effectiveness and practicality of the method were verified. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290037 Exemplaires
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Titre : Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems Type de document : texte imprimé Auteurs : Luo, Feng, Auteur ; Ma, Dongsheng, Auteur Article en page(s) : pp. 2151 - 2160 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Automatic substrate switching circuit (ASSC) Buck-boost converter Digital control Dynamic voltage scaling (DVS) Power-efficient system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : An integrated buck-boost converter with a tri-mode digital control is presented. It employs an adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to the ever-increasing electronic systems that employ dynamic voltage scaling (DVS) techniques for power-efficient operations. Three control modes are employed in the converter to operate jointly and seamlessly for performance optimization during the periods of start-up, steady state, and dynamic voltage/load transient states. To avoid latch-up problem and minimize leakage current, an automatic substrate switching circuit (ASSC) is introduced. The design was fabricated in a 0.35-¿m digital CMOS N-well process, with a die area of 1.3 mm2. It precisely regulates an adaptively adjustable power output from 0.9 to 3.0 V. The maximum efficiency is 96.5%, which is measured at 0.9-V output and 45-mW load power. The efficiency remains above 50% over the entire 800-mW power range. The converter responds to a 45-mA load step transient change within 600 ns. The DVS tracking speed is 37 ¿s/V for a 1-V step-down change and is 150 ¿s/V for a 1-V step-up change. With a line regulation of 20.4 mV/V, the converter functions robustly when the input power source frequently varies between 1.6 and 3.3 V. The ASSC consumes only 88- ¿W static power. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289976
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2151 - 2160[article] Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems [texte imprimé] / Luo, Feng, Auteur ; Ma, Dongsheng, Auteur . - pp. 2151 - 2160.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2151 - 2160
Mots-clés : Automatic substrate switching circuit (ASSC) Buck-boost converter Digital control Dynamic voltage scaling (DVS) Power-efficient system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : An integrated buck-boost converter with a tri-mode digital control is presented. It employs an adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to the ever-increasing electronic systems that employ dynamic voltage scaling (DVS) techniques for power-efficient operations. Three control modes are employed in the converter to operate jointly and seamlessly for performance optimization during the periods of start-up, steady state, and dynamic voltage/load transient states. To avoid latch-up problem and minimize leakage current, an automatic substrate switching circuit (ASSC) is introduced. The design was fabricated in a 0.35-¿m digital CMOS N-well process, with a die area of 1.3 mm2. It precisely regulates an adaptively adjustable power output from 0.9 to 3.0 V. The maximum efficiency is 96.5%, which is measured at 0.9-V output and 45-mW load power. The efficiency remains above 50% over the entire 800-mW power range. The converter responds to a 45-mA load step transient change within 600 ns. The DVS tracking speed is 37 ¿s/V for a 1-V step-down change and is 150 ¿s/V for a 1-V step-up change. With a line regulation of 20.4 mV/V, the converter functions robustly when the input power source frequently varies between 1.6 and 3.3 V. The ASSC consumes only 88- ¿W static power. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289976 Exemplaires
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Titre : Design of static output feedback sliding mode control for uncertain linear systems Type de document : texte imprimé Auteurs : Zhang, Jinhui, Auteur ; Xia, Yuanqing, Auteur Article en page(s) : pp. 2161 - 2170 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Linear matrix inequalities (LMIs) Mismatched uncertain systems Sliding mode control (SMC) Static output feedback Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper considers the problem of designing a sliding mode controller via static output feedback for a class of uncertain systems with mismatched uncertainty in the state matrix. First, we derive a new existence condition of linear sliding surface in terms of strict linear matrix inequalities (LMIs) and propose an adaptive reaching control law such that the motion of the closed-loop system satisfies the reaching condition. Second, we further consider the delay-type switching function, and a new robust stability condition is given in terms of LMIs for the reduced-order sliding mode dynamics. Then, a synthesis procedure is established to design the sliding surface parameters. Finally, three examples, including an aircraft model, are utilized to illustrate the design procedures proposed in this paper. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280258
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2161 - 2170[article] Design of static output feedback sliding mode control for uncertain linear systems [texte imprimé] / Zhang, Jinhui, Auteur ; Xia, Yuanqing, Auteur . - pp. 2161 - 2170.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2161 - 2170
Mots-clés : Linear matrix inequalities (LMIs) Mismatched uncertain systems Sliding mode control (SMC) Static output feedback Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper considers the problem of designing a sliding mode controller via static output feedback for a class of uncertain systems with mismatched uncertainty in the state matrix. First, we derive a new existence condition of linear sliding surface in terms of strict linear matrix inequalities (LMIs) and propose an adaptive reaching control law such that the motion of the closed-loop system satisfies the reaching condition. Second, we further consider the delay-type switching function, and a new robust stability condition is given in terms of LMIs for the reduced-order sliding mode dynamics. Then, a synthesis procedure is established to design the sliding surface parameters. Finally, three examples, including an aircraft model, are utilized to illustrate the design procedures proposed in this paper. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280258 Exemplaires
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Titre : Radial-basis-function-based neural network for harmonic detection Type de document : texte imprimé Auteurs : Chang, Gary W., Auteur ; Chen, Cheng-I, Auteur ; Teng, Yu-Feng, Auteur Article en page(s) : pp. 2171 - 2179 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Adaptive linear combiner (ADALINE) Back-propagation neural network Fast Fourier transform (FFT) Harmonics Radial-basis-function Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The widespread application of power-electronic loads has led to increasing harmonic pollution in the supply system. In order to prevent harmonics from deteriorating the power quality, detecting harmonic components for harmonic mitigations becomes a critical issue. In this paper, an effective procedure based on the radial-basis-function neural network is proposed to detect the harmonic amplitudes of the measured signal. By comparing with several commonly used methods, it is shown that the proposed solution procedure yields more accurate results and requires less sampled data for harmonic assessment. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290151
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2171 - 2179[article] Radial-basis-function-based neural network for harmonic detection [texte imprimé] / Chang, Gary W., Auteur ; Chen, Cheng-I, Auteur ; Teng, Yu-Feng, Auteur . - pp. 2171 - 2179.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2171 - 2179
Mots-clés : Adaptive linear combiner (ADALINE) Back-propagation neural network Fast Fourier transform (FFT) Harmonics Radial-basis-function Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : The widespread application of power-electronic loads has led to increasing harmonic pollution in the supply system. In order to prevent harmonics from deteriorating the power quality, detecting harmonic components for harmonic mitigations becomes a critical issue. In this paper, an effective procedure based on the radial-basis-function neural network is proposed to detect the harmonic amplitudes of the measured signal. By comparing with several commonly used methods, it is shown that the proposed solution procedure yields more accurate results and requires less sampled data for harmonic assessment. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5290151 Exemplaires
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Titre : Design and development of RFID label for steel coil Type de document : texte imprimé Auteurs : Kuo, Shih-Kang, Auteur ; Chen, Sung-Lin, Auteur ; Lin, Chang-Tsun, Auteur Article en page(s) : pp. 2180 - 2186 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Antenna design Monopole RF identification (RFID) tag Steel coil Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Although RF identification (RFID) technology has had a remarkable impact on various industries in recent years, designing RFID tags for metallic objects with satisfactory performance is still a challenge. So far, only few success stories have been reported in the steel industry. This paper presents the design and development of RFID labels for steel coils. In order to achieve automatic inventory during the product-delivery process, a novel antenna structure based on the principle of a monopole antenna has been designed, and the performance has been verified through measurements. In order to minimize the implementation cost added to the product line, the RFID tag is embedded into a barcode label with special perforations. A site test demonstrates that the developed tag has excellent performance, enabling automatic inventory using fixed readers. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289982
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2180 - 2186[article] Design and development of RFID label for steel coil [texte imprimé] / Kuo, Shih-Kang, Auteur ; Chen, Sung-Lin, Auteur ; Lin, Chang-Tsun, Auteur . - pp. 2180 - 2186.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2180 - 2186
Mots-clés : Antenna design Monopole RF identification (RFID) tag Steel coil Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Although RF identification (RFID) technology has had a remarkable impact on various industries in recent years, designing RFID tags for metallic objects with satisfactory performance is still a challenge. So far, only few success stories have been reported in the steel industry. This paper presents the design and development of RFID labels for steel coils. In order to achieve automatic inventory during the product-delivery process, a novel antenna structure based on the principle of a monopole antenna has been designed, and the performance has been verified through measurements. In order to minimize the implementation cost added to the product line, the RFID tag is embedded into a barcode label with special perforations. A site test demonstrates that the developed tag has excellent performance, enabling automatic inventory using fixed readers. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289982 Exemplaires
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Titre : A single-stage soft-switching flyback converter for power-factor-correction applications Type de document : texte imprimé Auteurs : Huang-Jen Chiu, Auteur ; Yu-Kang Lo, Auteur ; Lee, Hung-Chi, Auteur Article en page(s) : pp. 2187 - 2190 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Flyback converter Power-factor correction (PFC) Single stage Soft switching Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This letter presents a single-stage soft-switching Flyback converter for power-factor-correction (PFC) applications. High power factor and high conversion efficiency can be achieved by a simple single-stage circuit with soft-switching features. The operation principles and design criteria for the studied PFC converter are analyzed and discussed. A laboratory prototype is also built and tested. Finally, the experimental waveforms for this prototype circuit are shown to verify the feasibility of the proposed scheme. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280267
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2187 - 2190[article] A single-stage soft-switching flyback converter for power-factor-correction applications [texte imprimé] / Huang-Jen Chiu, Auteur ; Yu-Kang Lo, Auteur ; Lee, Hung-Chi, Auteur . - pp. 2187 - 2190.
Génie électrique
Langues : Anglais (eng)
in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2187 - 2190
Mots-clés : Flyback converter Power-factor correction (PFC) Single stage Soft switching Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This letter presents a single-stage soft-switching Flyback converter for power-factor-correction (PFC) applications. High power factor and high conversion efficiency can be achieved by a simple single-stage circuit with soft-switching features. The operation principles and design criteria for the studied PFC converter are analyzed and discussed. A laboratory prototype is also built and tested. Finally, the experimental waveforms for this prototype circuit are shown to verify the feasibility of the proposed scheme. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280267 Exemplaires
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