Documents disponibles écrits par cet auteur

Design considerations of a direct drive brushless machine with concentrated windings / Wrobel, R. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 1 - 8 Titre : Design considerations of a direct drive brushless machine with concentrated windings Type de document : texte imprimé Auteurs : Wrobel, R., Auteur ; Mellor, P.H., Auteur Année de publication : 2008 Article en page(s) : pp. 1 - 8 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Brushless  DC  motors;  electric  vehicles;  finite  element  analysis;  genetic  algorithms;  machine  windings;  permanent  magnet  machines Résumé : This paper discusses the performance attributes of the open-slot, modular-wound, external-rotor, topology of electrical machine. Combinations of pole and slot numbers are presented for which the winding factor is maximal and torque ripple is minimal. An optimization of the magnetic circuit design of six promising pole-slot configurations is undertaken using a parametric finite element model (FEM) combined with a genetic algorithm (GA). These designs are benchmarked against a conventional 1.5 slots/pole external-rotor brushless dc machine. These candidate electrical machine versions are characterized by having the same external-rotor diameter, total slot area available for the winding and by equal volumes of permanent magnet (PM). Based on the analysis, the most promising motor structure was selected and a prototype wheel-hub motor has been built for application in a small electrical vehicle. Test data from the prototype is used to validate the findings of the initial analyses and practically demonstrate the attributes of the topology. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4378207&sortType%3Das [...] [article] Design considerations of a direct drive brushless machine with concentrated windings [texte imprimé] / Wrobel, R., Auteur ; Mellor, P.H., Auteur . - 2008 . - pp. 1 - 8. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 1 - 8 Mots-clés : Brushless  DC  motors;  electric  vehicles;  finite  element  analysis;  genetic  algorithms;  machine  windings;  permanent  magnet  machines Résumé : This paper discusses the performance attributes of the open-slot, modular-wound, external-rotor, topology of electrical machine. Combinations of pole and slot numbers are presented for which the winding factor is maximal and torque ripple is minimal. An optimization of the magnetic circuit design of six promising pole-slot configurations is undertaken using a parametric finite element model (FEM) combined with a genetic algorithm (GA). These designs are benchmarked against a conventional 1.5 slots/pole external-rotor brushless dc machine. These candidate electrical machine versions are characterized by having the same external-rotor diameter, total slot area available for the winding and by equal volumes of permanent magnet (PM). Based on the analysis, the most promising motor structure was selected and a prototype wheel-hub motor has been built for application in a small electrical vehicle. Test data from the prototype is used to validate the findings of the initial analyses and practically demonstrate the attributes of the topology. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4378207&sortType%3Das [...]

Thermal performance of an open-slot modular-wound machine with external rotor / Wrobel, R. 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. 403 - 411 Titre : Thermal performance of an open-slot modular-wound machine with external rotor Type de document : texte imprimé Auteurs : Wrobel, R., Auteur ; Mellor, P.H., Auteur ; McNeill, N., Auteur Année de publication : 2010 Article en page(s) : pp. 403 - 411 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : brushless  DC  motors;  permanent  magnet  motors;  rotors;  thermal  analysis;  traction  motors;  windings Résumé : This paper describes the thermal analysis of an external-rotor brushless permanent-magnet motor used in a traction application. The machine has a nonstandard open-slot stator lamination and is wound with a single-layer concentrated ``modular'' winding. This structure potentially has several heat transfer advantages compared to the more traditional double-layer concentrated winding. An analytical lumped-parameter thermal model has been developed for the machine to gain an understanding of the main cooling mechanisms and to investigate the potential heat transfer advantages. The thermal advantage of the modular winding over the more conventional 1.5-slot-per-pole design is presented. Results from the developed thermal model have been validated experimentally on a prototype wheel hub motor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5467351&sortType%3Das [...] [article] Thermal performance of an open-slot modular-wound machine with external rotor [texte imprimé] / Wrobel, R., Auteur ; Mellor, P.H., Auteur ; McNeill, N., Auteur . - 2010 . - pp. 403 - 411. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 403 - 411 Mots-clés : brushless  DC  motors;  permanent  magnet  motors;  rotors;  thermal  analysis;  traction  motors;  windings Résumé : This paper describes the thermal analysis of an external-rotor brushless permanent-magnet motor used in a traction application. The machine has a nonstandard open-slot stator lamination and is wound with a single-layer concentrated ``modular'' winding. This structure potentially has several heat transfer advantages compared to the more traditional double-layer concentrated winding. An analytical lumped-parameter thermal model has been developed for the machine to gain an understanding of the main cooling mechanisms and to investigate the potential heat transfer advantages. The thermal advantage of the modular winding over the more conventional 1.5-slot-per-pole design is presented. Results from the developed thermal model have been validated experimentally on a prototype wheel hub motor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5467351&sortType%3Das [...]