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Rotor Eddy-Current loss in permanent-magnet brushless AC machines

Wang, J., Atallah, K., Chin, R., Arshad, W.M. and Lendenmann, H. (2010) Rotor Eddy-Current loss in permanent-magnet brushless AC machines. IEEE Transactions on Magnetics, 46 (7). pp. 2701-2707. ISSN 0018-9464

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Abstract

This paper analyzes rotor eddy-current loss in permanent-magnet brushless ac machines. It is shown that analytical or finite-element techniques published in literature for predicting rotor eddy-current loss using space harmonic based approaches may not yield correct results in each magnet segment when one magnet-pole is circumferentially segmented into more than two pieces. It is also shown that the eddy-current loss in each equally segmented piece may differ by a large margin, which implies that the temperature distribution in the magnets will be uneven and the risk of demagnetization has to be carefully assessed. The theoretical derivation is validated by time-stepped transient finite-element analysis.

Item Type: Article
Copyright, Publisher and Additional Information: © Copyright 2010 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: Eddy-current loss; permanent-magnet brushless machines
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: 22 Oct 2010 09:01
Last Modified: 04 Jun 2014 08:28
Published Version: http://dx.doi.org/10.1109/TMAG.2010.2042963
Status: Published
Publisher: Institute of Electrical and Electronics Engineers
Refereed: Yes
Identification Number: 10.1109/TMAG.2010.2042963
URI: http://eprints.whiterose.ac.uk/id/eprint/42577

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