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Incorporating motion in mesh-based magnetic equivalent circuits / Bash, M. L. 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. 329 - 338 Titre : Incorporating motion in mesh-based magnetic equivalent circuits Type de document : texte imprimé Auteurs : Bash, M. L., Auteur ; Williams, J.M., Auteur ; Pekarek, S.D., Auteur Année de publication : 2010 Article en page(s) : pp. 329 - 338 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : air  gaps;  electric  machines;  equivalent  circuits;  magnetic  circuits;  mesh  generation;  rotors;  synchronous  machines Résumé : Recent research has compared the numerical efficiency of magnetic equivalent circuit (MEC) models based upon Kirchhoff's voltage law (mesh equations) and Kirchhoff's current law (nodal equations). For stationary magnetic components, it was shown that mesh-based methods converge in significantly fewer iterations. Although the numerical advantages would seemingly apply to electric machines, two issues have limited the application of mesh-based MEC models to electric machines. With movement, the number of meshes (unlike the number of nodes) is position dependent. Additionally, the loss of an airgap element creates an infinite reluctance. In this paper, both issues are addressed. Specifically, it is first shown that a relatively straightforward algorithm can be used to dynamically update meshes with rotor position. In addition, it is shown that the mesh model remains stable for very large values of tube reluctance. Tube reluctance values that are large enough to cause numerical issues can be easily avoided by excluding a very narrow range of rotor positions. Based upon these results, a mesh-based MEC model of a wound-rotor synchronous machine is developed and is shown to provide a significant advantage over its nodal-based model equivalent. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5378586&sortType%3Das [...] [article] Incorporating motion in mesh-based magnetic equivalent circuits [texte imprimé] / Bash, M. L., Auteur ; Williams, J.M., Auteur ; Pekarek, S.D., Auteur . - 2010 . - pp. 329 - 338. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 329 - 338 Mots-clés : air  gaps;  electric  machines;  equivalent  circuits;  magnetic  circuits;  mesh  generation;  rotors;  synchronous  machines Résumé : Recent research has compared the numerical efficiency of magnetic equivalent circuit (MEC) models based upon Kirchhoff's voltage law (mesh equations) and Kirchhoff's current law (nodal equations). For stationary magnetic components, it was shown that mesh-based methods converge in significantly fewer iterations. Although the numerical advantages would seemingly apply to electric machines, two issues have limited the application of mesh-based MEC models to electric machines. With movement, the number of meshes (unlike the number of nodes) is position dependent. Additionally, the loss of an airgap element creates an infinite reluctance. In this paper, both issues are addressed. Specifically, it is first shown that a relatively straightforward algorithm can be used to dynamically update meshes with rotor position. In addition, it is shown that the mesh model remains stable for very large values of tube reluctance. Tube reluctance values that are large enough to cause numerical issues can be easily avoided by excluding a very narrow range of rotor positions. Based upon these results, a mesh-based MEC model of a wound-rotor synchronous machine is developed and is shown to provide a significant advantage over its nodal-based model equivalent. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5378586&sortType%3Das [...]