Documents disponibles écrits par cet auteur

3-D magnetic equivalent circuit framework for modeling electromechanical devices / Amrhein, M. in IEEE transactions on energy conversion, Vol. 24 N° 2 (Juin 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 397 - 405 Titre : 3-D magnetic equivalent circuit framework for modeling electromechanical devices Type de document : texte imprimé Auteurs : Amrhein, M., Auteur ; Krein, P.T., Auteur Année de publication : 2009 Article en page(s) : pp. 397 - 405 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : CAD;  asynchronous  machines;  equivalent  circuits;  finite  element  analysis;  inductors;  lumped  parameter  networks;  magnetic  circuits Résumé : Magnetic equivalent circuits (MECs) are becoming an accepted alternative to electrical-equivalent lumped-parameter models and finite-element analysis (FEA) for simulating electromechanical devices. Their key advantages are moderate computational effort, reasonable accuracy, and flexibility in model size. MECs are easily extended into three dimensions. But despite the successful use of MEC as a modeling tool, a generalized 3-D formulation useable for a comprehensive computer-aided design tool has not yet emerged (unlike FEA, where general modeling tools are readily available). This paper discusses the framework of a 3-D MEC modeling approach, and presents the implementation of a variable-sized reluctance network distribution based on 3-D elements. Force calculation and modeling of moving objects are considered. Two experimental case studies, a soft-ferrite inductor and an induction machine, show promising results when compared to measurements and simulations of lumped parameter and FEA models. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957572&sortType%3Das [...] [article] 3-D magnetic equivalent circuit framework for modeling electromechanical devices [texte imprimé] / Amrhein, M., Auteur ; Krein, P.T., Auteur . - 2009 . - pp. 397 - 405. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 397 - 405 Mots-clés : CAD;  asynchronous  machines;  equivalent  circuits;  finite  element  analysis;  inductors;  lumped  parameter  networks;  magnetic  circuits Résumé : Magnetic equivalent circuits (MECs) are becoming an accepted alternative to electrical-equivalent lumped-parameter models and finite-element analysis (FEA) for simulating electromechanical devices. Their key advantages are moderate computational effort, reasonable accuracy, and flexibility in model size. MECs are easily extended into three dimensions. But despite the successful use of MEC as a modeling tool, a generalized 3-D formulation useable for a comprehensive computer-aided design tool has not yet emerged (unlike FEA, where general modeling tools are readily available). This paper discusses the framework of a 3-D MEC modeling approach, and presents the implementation of a variable-sized reluctance network distribution based on 3-D elements. Force calculation and modeling of moving objects are considered. Two experimental case studies, a soft-ferrite inductor and an induction machine, show promising results when compared to measurements and simulations of lumped parameter and FEA models. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957572&sortType%3Das [...]

Force calculation in 3-D magnetic equivalent circuit networks with a maxwell stress tensor / Amrhein, M. in IEEE transactions on energy conversion, Vol. 24 N° 3 (Septembre 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 587 - 593 Titre : Force calculation in 3-D magnetic equivalent circuit networks with a maxwell stress tensor Type de document : texte imprimé Auteurs : Amrhein, M., Auteur ; Krein, P.T., Auteur Année de publication : 2010 Article en page(s) : pp. 587 - 593 Note générale : Energy Conversion Langues : Anglais (eng) Mots-clés : Finite  element  analysis--Magnetic  circuits Résumé : Magnetic equivalent circuit (MEC) models are increasingly valuable for analysis and design of electromechanical devices, particularly electrical machines, because of their moderate computational effort and reasonable accuracy. Force and torque calculations in prior MEC implementations are almost exclusively based on the virtual work method (VWM) adapted to the specific device model. But VWM does not easily extend to a general MEC modeling approach. In this paper, the more direct Maxwell stress tensor (MST) method is applied to a general 3-D MEC modeling framework. MST theory and implementation are presented. Its application is discussed with the example of an electromagnet. Results are compared to both measurements and analytical and finite-element models. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5075663&sortType%3Das [...] [article] Force calculation in 3-D magnetic equivalent circuit networks with a maxwell stress tensor [texte imprimé] / Amrhein, M., Auteur ; Krein, P.T., Auteur . - 2010 . - pp. 587 - 593. Energy Conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 587 - 593 Mots-clés : Finite  element  analysis--Magnetic  circuits Résumé : Magnetic equivalent circuit (MEC) models are increasingly valuable for analysis and design of electromechanical devices, particularly electrical machines, because of their moderate computational effort and reasonable accuracy. Force and torque calculations in prior MEC implementations are almost exclusively based on the virtual work method (VWM) adapted to the specific device model. But VWM does not easily extend to a general MEC modeling approach. In this paper, the more direct Maxwell stress tensor (MST) method is applied to a general 3-D MEC modeling framework. MST theory and implementation are presented. Its application is discussed with the example of an electromagnet. Results are compared to both measurements and analytical and finite-element models. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5075663&sortType%3Das [...]

Induction machine modeling approach based on 3-D magnetic equivalent circuit framework / Amrhein, M. 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. 339 - 347 Titre : Induction machine modeling approach based on 3-D magnetic equivalent circuit framework Type de document : texte imprimé Auteurs : Amrhein, M., Auteur ; Krein, P.T., Auteur Année de publication : 2010 Article en page(s) : pp. 339 - 347 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : asynchronous  machines;  electric  machine  CAD;  equivalent  circuits Résumé : Developments in power electronics technology, materials, and changing application requirements are driving advances in electric machines. Limitations of standard motor design, particularly for induction machines, restrict performance capabilities in drive applications. Current computer-aided design tools are inadequate to overcome these limitations. Lumped-parameter and finite-element models have limited accuracy and heavy computational effort, respectively. Magnetic equivalent circuits (MEC) avoid these limitations. This paper presents an induction machine MEC model geared toward design and based on a 3-D MEC framework introduced in previous work. A matrix formulation suitable for computation is described. Details of mesh generation for the MEC approach are provided. Force and performance estimation are discussed. Simulations based on this approach are able to track dynamic effects, such as rotor slot torque ripple contributions. Comparisons are made to a 500 W purpose-built machine. Results from lumped-parameter and finite-element models and measurements indicate that MECs, corrected for local saturation, are a promising option for design tools. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5467361&sortType%3Das [...] [article] Induction machine modeling approach based on 3-D magnetic equivalent circuit framework [texte imprimé] / Amrhein, M., Auteur ; Krein, P.T., Auteur . - 2010 . - pp. 339 - 347. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 339 - 347 Mots-clés : asynchronous  machines;  electric  machine  CAD;  equivalent  circuits Résumé : Developments in power electronics technology, materials, and changing application requirements are driving advances in electric machines. Limitations of standard motor design, particularly for induction machines, restrict performance capabilities in drive applications. Current computer-aided design tools are inadequate to overcome these limitations. Lumped-parameter and finite-element models have limited accuracy and heavy computational effort, respectively. Magnetic equivalent circuits (MEC) avoid these limitations. This paper presents an induction machine MEC model geared toward design and based on a 3-D MEC framework introduced in previous work. A matrix formulation suitable for computation is described. Details of mesh generation for the MEC approach are provided. Force and performance estimation are discussed. Simulations based on this approach are able to track dynamic effects, such as rotor slot torque ripple contributions. Comparisons are made to a 500 W purpose-built machine. Results from lumped-parameter and finite-element models and measurements indicate that MECs, corrected for local saturation, are a promising option for design tools. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5467361&sortType%3Das [...]

A time-harmonic three-dimensional vector boundary element model for electromechanical devices / O'Connell, T.C. 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. 606 - 618 Titre : A time-harmonic three-dimensional vector boundary element model for electromechanical devices Type de document : texte imprimé Auteurs : O'Connell, T.C., Auteur ; Krein, P.T., Auteur Année de publication : 2011 Article en page(s) : pp. 606 - 618 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : boundary-elements  methods;  boundary-value  problems;  electric  machines;  finite  element  analysis;  machine  theory;  matrix  algebra Résumé : In present practice, the most effective way to solve the large electromagnetic (EM) boundary value problems typical in electromechanical device analysis has been with the finite element method (FEM). The sparse, symmetric, and banded structure of FEM system matrices reduces the memory requirements and facilitates several fast and efficient solution algorithms. An alternative, boundary element methods (BEM), is more computationally intensive. Recently, however, fast and efficient solver codes have been developed for BEM solutions of EM scattering problems. These, if effectively implemented in electromechanical device models, can make BEM a more feasible alternative for this purpose than previously. To generate a deeper understanding of this alternative formulation in the context of electromechanics problems, a time-harmonic 3-D vector BEM model for electromechanical devices is presented that is formulated in terms of the field variables and is capable of modeling multiple separated homogeneous regions with or without eddy currents. Extensions to electric machine modeling are given, and the model is assessed using experimental data. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437340&sortType%3Das [...] [article] A time-harmonic three-dimensional vector boundary element model for electromechanical devices [texte imprimé] / O'Connell, T.C., Auteur ; Krein, P.T., Auteur . - 2011 . - pp. 606 - 618. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 606 - 618 Mots-clés : boundary-elements  methods;  boundary-value  problems;  electric  machines;  finite  element  analysis;  machine  theory;  matrix  algebra Résumé : In present practice, the most effective way to solve the large electromagnetic (EM) boundary value problems typical in electromechanical device analysis has been with the finite element method (FEM). The sparse, symmetric, and banded structure of FEM system matrices reduces the memory requirements and facilitates several fast and efficient solution algorithms. An alternative, boundary element methods (BEM), is more computationally intensive. Recently, however, fast and efficient solver codes have been developed for BEM solutions of EM scattering problems. These, if effectively implemented in electromechanical device models, can make BEM a more feasible alternative for this purpose than previously. To generate a deeper understanding of this alternative formulation in the context of electromechanics problems, a time-harmonic 3-D vector BEM model for electromechanical devices is presented that is formulated in terms of the field variables and is capable of modeling multiple separated homogeneous regions with or without eddy currents. Extensions to electric machine modeling are given, and the model is assessed using experimental data. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437340&sortType%3Das [...]