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Influence of skew and cross-coupling on flux-weakening performance of permanent-magnet brushless AC machines

Qi, G., Chen, J.T., Zhu, Z.Q., Howe, D., Zhou, L.B. and Gu, C.L. (2009) Influence of skew and cross-coupling on flux-weakening performance of permanent-magnet brushless AC machines. IEEE Transactions on Magnetics, 45 (5). pp. 2110-2117. ISSN 0018-9464

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Abstract

A method is proposed for predicting the flux-weakening performance of permanent-magnet (PM) brushless ac machines accounting for skew and d-q axis cross-coupling. The method is based on a d-q-axis flux-linkage model, a hybrid 2-D finite-element (FE)-analytical method being used to predict the d- and q-axis inductances. However, it only requires 2-D FE analysis of the magnetic field distribution over a cross section of the machine. The developed method is used to predict the torque-speed characteristic of an interior PM brushless ac machine with one stator slot-pitch skew. This is compared with predictions from a direct FE analysis of the machine and validated by measurements.

Item Type: Article
Copyright, Publisher and Additional Information: © Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Cross-coupling; flux-weakening; inductances; magnetic saturation; optimal control; permanent-magnet machine; skew
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 27 May 2009 16:13
Last Modified: 17 Sep 2014 01:52
Published Version: http://dx.doi.org/10.1109/TMAG.2009.2013244
Status: Published
Publisher: IEEE
Refereed: Yes
Identification Number: 10.1109/TMAG.2009.2013244
URI: http://eprints.whiterose.ac.uk/id/eprint/8610

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