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A Method for Predicting Flux Loss of Multipole Magnet and Its Evaluation


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タイトル: A Method for Predicting Flux Loss of Multipole Magnet and Its Evaluation
著者: Fukunaga, Hirotoshi / Narikiyo, Shohei / Koreeda, Hiroyuki / Yanai, Takeshi / Nakano, Masaki / Yamashita, Fumitoshi
発行日: 2011年10月
出版者: Institute of Electrical and Electronics Engineers
引用: IEEE Transactions on Magnetics, 47(10), pp.4108-4111; 2011
抄録: The prediction of flux loss due to exposure at an elevated temperature is very important in applications of Nd-Fe-B magnets because of the low Curie temperature of the Nd2 Fe14 B. Previously, we proposed the prediction method of the initial flux loss, FLint, from basic magnetic properties of a magnet by taking advantage of the finite element method. The prediction method takes the magnetizing process and the distribution of coercivity into account, and is composed of four steps, 1) simulation of distribution of magnetization under magnetizing filed, 2) determination of demagnetization curves at room and exposure temperatures, 3) simulation of distributions of magnetization at room and exposure temperatures, and finally 4) prediction of distribution of FLint. We applied this method to a Nd-Fe-B ring magnet with 12 poles, and predicted FLint due to the exposure at 120°C. Subsequently, the prediction method was evaluated by comparing the predicted FLint values with the experimental ones. The predicted FLint values agreed with those obtained experimentally, which suggests the validity of the proposed method.
キーワード: Coercivity / flux loss / magnetization process / Nd-Fe-B magnet / permanent magnet motor
URI: http://hdl.handle.net/10069/26164
ISSN: 00189464
DOI: 10.1109/TMAG.2011.2158195
権利: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
資料タイプ: Journal Article
原稿種類: author
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/26164

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