Documents disponibles écrits par cet auteur

A field reconstruction technique for efficient modeling of the fields and forces within induction machines / Dezheng, Wu 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. 366 - 374 Titre : A field reconstruction technique for efficient modeling of the fields and forces within induction machines Type de document : texte imprimé Auteurs : Dezheng, Wu, Auteur ; Pekarek, S.D., Auteur ; Fahimi, B., Auteur Année de publication : 2009 Article en page(s) : pp. 366 - 374 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous  machines;  computational  complexity;  finite  element  analysis Résumé : Traditional analysis and design of induction machines have been largely based upon lumped-parameter models. An alternative tool used for field-based evaluations of an induction machine is the finite-element method. Although useful, its computational complexity limits its use as a design tool. In this paper, a field reconstruction (FR) method for induction machine simulation is introduced. The FR method utilizes a small number of finite-element evaluations to establish basis functions of normal and tangential flux densities. The basis functions are then used to estimate the magnetic field under arbitrary stator excitation. Using such a tool, evaluation of fields and forces produced by a machine under alternative excitation strategies can be explored efficiently. Moreover, alternative field-based derivation of stator/rotor excitation control can be explored. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957569&sortType%3Das [...] [article] A field reconstruction technique for efficient modeling of the fields and forces within induction machines [texte imprimé] / Dezheng, Wu, Auteur ; Pekarek, S.D., Auteur ; Fahimi, B., Auteur . - 2009 . - pp. 366 - 374. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 366 - 374 Mots-clés : Asynchronous  machines;  computational  complexity;  finite  element  analysis Résumé : Traditional analysis and design of induction machines have been largely based upon lumped-parameter models. An alternative tool used for field-based evaluations of an induction machine is the finite-element method. Although useful, its computational complexity limits its use as a design tool. In this paper, a field reconstruction (FR) method for induction machine simulation is introduced. The FR method utilizes a small number of finite-element evaluations to establish basis functions of normal and tangential flux densities. The basis functions are then used to estimate the magnetic field under arbitrary stator excitation. Using such a tool, evaluation of fields and forces produced by a machine under alternative excitation strategies can be explored efficiently. Moreover, alternative field-based derivation of stator/rotor excitation control can be explored. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957569&sortType%3Das [...]

A multirate field construction technique for efficient modeling of the fields and forces within inverter-fed induction machines / Dezheng, Wu in IEEE transactions on energy conversion, Vol. 25 N° 1 (Mars 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 217 - 227 Titre : A multirate field construction technique for efficient modeling of the fields and forces within inverter-fed induction machines Type de document : texte imprimé Auteurs : Dezheng, Wu, Auteur ; Pekarek, S.D., Auteur Année de publication : 2010 Article en page(s) : pp. 217 - 227 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : air  gaps;  asynchronous  machines;  finite  element  analysis;  invertors;  power  convertors;  power  electronics Résumé : In recent research, a field construction technique (FCT) was derived to enable more efficient evaluation of the magnetic fields and forces within induction machines. Using the FCT, the results of two finite-element (FE) solutions are used to establish basis functions for the flux densities in the airgap of the machine. The basis functions are then used to predict the magnetic fields and forces under arbitrary stator excitation. In this paper, a multirate FCT (MRFCT) is proposed to enable efficient FCT modeling of machines that are connected to power electronic converters. Within the MRFCT, the low- and high-frequency components of the stator current are partitioned. The partitioned currents are then used to calculate the flux density and forces at time steps commensurate with the respective low- and high-frequency dynamics. It is shown that applying the MRFCT, the forces and fields of a machine connected to a power electronic circuit can be obtained at a small fraction of the time required for a coupled FE/circuit model. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5350668&sortType%3Das [...] [article] A multirate field construction technique for efficient modeling of the fields and forces within inverter-fed induction machines [texte imprimé] / Dezheng, Wu, Auteur ; Pekarek, S.D., Auteur . - 2010 . - pp. 217 - 227. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 217 - 227 Mots-clés : air  gaps;  asynchronous  machines;  finite  element  analysis;  invertors;  power  convertors;  power  electronics Résumé : In recent research, a field construction technique (FCT) was derived to enable more efficient evaluation of the magnetic fields and forces within induction machines. Using the FCT, the results of two finite-element (FE) solutions are used to establish basis functions for the flux densities in the airgap of the machine. The basis functions are then used to predict the magnetic fields and forces under arbitrary stator excitation. In this paper, a multirate FCT (MRFCT) is proposed to enable efficient FCT modeling of machines that are connected to power electronic converters. Within the MRFCT, the low- and high-frequency components of the stator current are partitioned. The partitioned currents are then used to calculate the flux density and forces at time steps commensurate with the respective low- and high-frequency dynamics. It is shown that applying the MRFCT, the forces and fields of a machine connected to a power electronic circuit can be obtained at a small fraction of the time required for a coupled FE/circuit model. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5350668&sortType%3Das [...]

A voltage-input-based field reconstruction technique for efficient modeling of the fields and forces within induction machines / Dezheng, Wu in IEEE transactions on industrial electronics, Vol. 57 N° 3 (Mars 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 3 (Mars 2010) . - pp. 994 - 1001 Titre : A voltage-input-based field reconstruction technique for efficient modeling of the fields and forces within induction machines Type de document : texte imprimé Auteurs : Dezheng, Wu, Auteur ; Pekarek, Steven D., Auteur ; Fahimi, Babak, Auteur Article en page(s) : pp. 994 - 1001 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Field  reconstruction  Finite-element  analysis  (FEA)  Induction  motor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In recent research, a field reconstruction (FR) technique was developed to enable more efficient evaluation of the magnetic fields and forces within induction machines. By using the FR, the results of two finite-element (FE) solutions (in which stator current is used as the input to the FE model) are used to establish basis functions for the flux densities in the air gap of the machine. The basis functions are then used to predict the magnetic fields and forces under arbitrary stator excitation. In this paper, the technique is enhanced to enable modeling with stator voltage (rather than stator current) as the model input. This enables a more convenient coupling of the FR model to external circuit components to model overall system performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313868 [article] A voltage-input-based field reconstruction technique for efficient modeling of the fields and forces within induction machines [texte imprimé] / Dezheng, Wu, Auteur ; Pekarek, Steven D., Auteur ; Fahimi, Babak, Auteur . - pp. 994 - 1001. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 3 (Mars 2010) . - pp. 994 - 1001 Mots-clés : Field  reconstruction  Finite-element  analysis  (FEA)  Induction  motor Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In recent research, a field reconstruction (FR) technique was developed to enable more efficient evaluation of the magnetic fields and forces within induction machines. By using the FR, the results of two finite-element (FE) solutions (in which stator current is used as the input to the FE model) are used to establish basis functions for the flux densities in the air gap of the machine. The basis functions are then used to predict the magnetic fields and forces under arbitrary stator excitation. In this paper, the technique is enhanced to enable modeling with stator voltage (rather than stator current) as the model input. This enables a more convenient coupling of the FR model to external circuit components to model overall system performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313868