提高永磁体电阻率对降低高速永磁交流电机转子涡流损耗的有效性分析

doi:10.19595/j.cnki.1000-6753.tces.200255

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Abstract When permanent magnets (PM) are exposed to harmonic fields, eddy current exists if the magnets are electrically conductive, causing power loss. Increasing the magnet resistivity is a direct way to reduce the eddy current in the magnets. However, in high-speed PM AC machines, eddy current occurs not only in the magnets, but also in the metal retaining sleeve and the copper shielding layer of the rotor. Under such a circumstance, is the technique of increasing the magnet resistivity still workable? This will be answered in this article, through a comparative finite element analysis.

Key words： High-speed machine permanent magnets (PM) AC machine rotor eddy current loss magnet resistivity retaining sleeve copper shielding layer

Received: 12 March 2020 Published: 12 May 2020

PACS:

TM315

Fund:This work was supported by the Natural Science Foundation of China under the grants of 51837010 and 51690182.

Corresponding Authors: Wang Yunchong born in 1987, associate professor. His main research interests include design and control of high speed machines, PM machines and SynRM.E-mail: wangycee@zju.edu.cn

About author:: Shen Jianxin born in 1969, professor. His main research interests include design, control and applications of PM machines, SynRM, high speed machines, and high efficiency motor drives.E-mail: J_X_Shen@zju.edu.cn

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Cite this article:

Shen Jianxin,Han Ting,Yao Lei等. Is Higher Resistivity of Magnet Beneficial to Reduce Rotor Eddy Current Loss in High-Speed Permanent Magnets AC Machines?[J]. Transactions of China Electrotechnical Society, 2020, 35(9): 2074-2078.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200255 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I9/2074

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