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Fukuma, A. Okayama University
Kanazawa, Susumu Okayama University
Miyagi, Daisuke Okayama University
Takahashi, Norio Okayama University
NdFeB sintered magnets are widely used in rotating electrical machines. In order to develop an efficient rotating machine, it is important to estimate ac loss of the permanent magnet of rotor precisely. In this paper, the ac losses of the permanent magnet of IEEJ model (surface permanent-magnet motor model) are examined by using the three-dimensional finite-element method taking into account the newly measured hysteresis losses of permanent magnet. The result shows that we should consider not only the eddy-current loss but also the hysteresis loss, when the frequency of ac field due to a slot ripple is of the order of several hundred hertz.
Digital Object Identifier: 10.1109/TMAG.2005.846282
Published with permission from the copyright holder. This is the institute's copy, as published in Magnetics, IEEE Transactions on, May 2005, Volume 41, Issue 5, Pages 1964-1967.
Copyright © 2005 IEEE. All rights reserved.