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Reduction in Flux Loss of an Nd-Fe-B Bonded Ring Magnet for an SPM Motor


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Title: Reduction in Flux Loss of an Nd-Fe-B Bonded Ring Magnet for an SPM Motor
Authors: Yanai, Takeshi / Horita, Satoshi / Nakano, Masaki / Tsutsumi, Shinichi / Fukunaga, Hirotoshi
Issue Date: 1-Nov-2014
Publisher: IEEE
Citation: IEEE Transactions on Magnetics, 50(11), 7400804
Abstract: We have previously proposed a simulation method of an initial flux loss in permanent magnets using finite element method, and confirmed that predicted flux loss of an Nd-Fe-B boned ring magnet showed good agreement with measured flux loss. In this paper, we applied our proposed method to an Nd-Fe-B boned ring magnet in an SPM motor. We modeled a rotor composed of an Nd-Fe-B bonded ring magnet and a soft magnetic core made from silicon steels, and carried out the simulations for magnetizing process and prediction process of the flux loss. From the simulation results, we found that the inner side of the ring magnet has large flux loss. In order to reduce in flux loss, we enhanced the coercivity in the inner side of the ring magnet by partial replacement with another bonded magnet with high coercivity. Consequently, we found that the ring magnet with locally enhanced coercivity is effective to reduce in the flux loss.
Keywords: Bonded magnet / flux loss / Nd-Fe-B / SPM motor
URI: http://hdl.handle.net/10069/35014
ISSN: 00189464
DOI: 10.1109/TMAG.2014.2324274
Rights: © 2014 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.
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/35014

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