Documents disponibles écrits par cet auteur

Direct self-control for BLDC motor drives based on three-dimensional coordinate system / Jin, Gao in IEEE transactions on industrial electronics, Vol. 57 N° 8 (Août 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2836 - 2844 Titre : Direct self-control for BLDC motor drives based on three-dimensional coordinate system Type de document : texte imprimé Auteurs : Jin, Gao, Auteur ; Yuwen, Hu, Auteur Année de publication : 2011 Article en page(s) : pp. 2836 - 2844 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Brushless  dc  (BLDC)  Motor  drive  Direct  self-control  (DSC)  Sensorless  Three-dimensional  coordinate  Torque  transient  response Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new control algorithm for brushless dc (BLDC) motor drives is presented. Direct self-control, which has been widely applied on induction motor drives in high-power low-frequency traction, is introduced to BLDC drives. The Cartesian coordinate system is selected with three coordinate axes X, Y, and Z mutually at right angle to each other with three phase axes a, b, and c being movable. A two-phase conduction scheme is selected with the axis of the exciting phase located in the X-Y plane or, otherwise, along the direction of the Z -axis during unexcited (i.e., the unexcited phase axis is always directed along the Z-axis). The tracks of stator flux and voltage vectors are all three-dimensional, as a result of a variable voltage of unexcited phase and commutation every 60 electrical degrees. However, projections on the X-Y plane of these three-dimensional tracks are concise. The projection of flux vector is a hexagonal path, whereas the voltage vector projections are six active vectors. The projection of stator flux is controlled by the projections of voltage vectors. The newly proposed algorithm can be implemented with relatively low cost hardware and concise software, presenting fast torque transient response in 0.1 ms. The sensorless control is also implemented by flux estimation once in one sector. The validity and effectiveness of the proposed scheme are verified with simulated and experimental results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332310 [article] Direct self-control for BLDC motor drives based on three-dimensional coordinate system [texte imprimé] / Jin, Gao, Auteur ; Yuwen, Hu, Auteur . - 2011 . - pp. 2836 - 2844. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2836 - 2844 Mots-clés : Brushless  dc  (BLDC)  Motor  drive  Direct  self-control  (DSC)  Sensorless  Three-dimensional  coordinate  Torque  transient  response Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new control algorithm for brushless dc (BLDC) motor drives is presented. Direct self-control, which has been widely applied on induction motor drives in high-power low-frequency traction, is introduced to BLDC drives. The Cartesian coordinate system is selected with three coordinate axes X, Y, and Z mutually at right angle to each other with three phase axes a, b, and c being movable. A two-phase conduction scheme is selected with the axis of the exciting phase located in the X-Y plane or, otherwise, along the direction of the Z -axis during unexcited (i.e., the unexcited phase axis is always directed along the Z-axis). The tracks of stator flux and voltage vectors are all three-dimensional, as a result of a variable voltage of unexcited phase and commutation every 60 electrical degrees. However, projections on the X-Y plane of these three-dimensional tracks are concise. The projection of flux vector is a hexagonal path, whereas the voltage vector projections are six active vectors. The projection of stator flux is controlled by the projections of voltage vectors. The newly proposed algorithm can be implemented with relatively low cost hardware and concise software, presenting fast torque transient response in 0.1 ms. The sensorless control is also implemented by flux estimation once in one sector. The validity and effectiveness of the proposed scheme are verified with simulated and experimental results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332310

A fault-tolerant induction generator system based on instantaneous torque control (ITC) / Yuwen, Hu in IEEE transactions on energy conversion, Vol. 25 N° 2 (Juin 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 412 - 421 Titre : A fault-tolerant induction generator system based on instantaneous torque control (ITC) Type de document : texte imprimé Auteurs : Yuwen, Hu, Auteur ; Lanhong Zhang, Auteur ; Wenxin Huang, Auteur Année de publication : 2010 Article en page(s) : pp. 412 - 421 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : asynchronous  generators;  fault  tolerance;  switching  convertors;  torque  control Résumé : A fault-tolerant scheme of an induction generator using instantaneous torque control (ITC) is proposed in this paper. In the case that a power switch of the converter goes wrong, the system can be reconfigured to a four-switch three-phase (FSTP) generator system and continue supplying some power. In the reconfigured system, the ITC strategy can also be applied; the only differences lie in the available voltage space vectors and optimal switching-table. There are only two bridges working in the post-failure operation, which results in halved output power compared with that of prefailure six-switch three-phase system. This paper also investigates the special issues of the voltage ripples and drifts of the midpoint voltage of the dc bus capacitor of the FSTP system. The optimization of capacitor and the improvement of ITC strategy can effectively solve the two issues. In order to further improve the quality of the output dc voltage, the space vector modulation -ITC strategy is examined by modeling and experimental tests, which can greatly reduce the fluctuations of output voltage. Its voltage ripple is only 0.5 V on the output voltage of 270 V dc. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437315&sortType%3Das [...] [article] A fault-tolerant induction generator system based on instantaneous torque control (ITC) [texte imprimé] / Yuwen, Hu, Auteur ; Lanhong Zhang, Auteur ; Wenxin Huang, Auteur . - 2010 . - pp. 412 - 421. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 412 - 421 Mots-clés : asynchronous  generators;  fault  tolerance;  switching  convertors;  torque  control Résumé : A fault-tolerant scheme of an induction generator using instantaneous torque control (ITC) is proposed in this paper. In the case that a power switch of the converter goes wrong, the system can be reconfigured to a four-switch three-phase (FSTP) generator system and continue supplying some power. In the reconfigured system, the ITC strategy can also be applied; the only differences lie in the available voltage space vectors and optimal switching-table. There are only two bridges working in the post-failure operation, which results in halved output power compared with that of prefailure six-switch three-phase system. This paper also investigates the special issues of the voltage ripples and drifts of the midpoint voltage of the dc bus capacitor of the FSTP system. The optimization of capacitor and the improvement of ITC strategy can effectively solve the two issues. In order to further improve the quality of the output dc voltage, the space vector modulation -ITC strategy is examined by modeling and experimental tests, which can greatly reduce the fluctuations of output voltage. Its voltage ripple is only 0.5 V on the output voltage of 270 V dc. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437315&sortType%3Das [...]

A novel instantaneous torque control scheme for induction generator systems / Yuwen, Hu in IEEE transactions on energy conversion, Vol. 25, N° 3 (Septembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 795 - 803 Titre : A novel instantaneous torque control scheme for induction generator systems Type de document : texte imprimé Auteurs : Yuwen, Hu, Auteur ; Wenxin Huang, Auteur ; Li Yong, Auteur Année de publication : 2011 Article en page(s) : pp. 795 - 803 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous  generators;  machine  control;  torque  control;  voltage  control Résumé : In this paper, a novel instantaneous torque control is proposed to control the output voltage of a stand-alone induction generator. The output voltage regulation is achieved by the fast control of the space voltage vector based on the information of the output voltage and output current, which leads to a better system dynamic performance. The simulation and experimental results verify the effectiveness of the proposed scheme. The control scheme for the voltage buildup process is investigated as well. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5552144&sortType%3Das [...] [article] A novel instantaneous torque control scheme for induction generator systems [texte imprimé] / Yuwen, Hu, Auteur ; Wenxin Huang, Auteur ; Li Yong, Auteur . - 2011 . - pp. 795 - 803. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 795 - 803 Mots-clés : Asynchronous  generators;  machine  control;  torque  control;  voltage  control Résumé : In this paper, a novel instantaneous torque control is proposed to control the output voltage of a stand-alone induction generator. The output voltage regulation is achieved by the fast control of the space voltage vector based on the information of the output voltage and output current, which leads to a better system dynamic performance. The simulation and experimental results verify the effectiveness of the proposed scheme. The control scheme for the voltage buildup process is investigated as well. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5552144&sortType%3Das [...]