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(英文)  

Is Higher Resistivity of Magnet Beneficial to Reduce Rotor Eddy Current Loss in High-Speed Permanent Magnets AC Machines?

作　　者：沈建新[1,2] 韩婷 尧磊 王云冲 Shen Jianxin;Han Ting;Yao Lei;Wang Yunchong(College of Electrical Engineering Zhejiang University,Hangzhou 310027 China;Zhejiang Provincial Key Laboratory of Electrical Machine Systems,Hangzhou 310027 China)

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]浙江省电机系统智能控制与变流技术重点实验室,杭州310027

出　　处：《电工技术学报》2020年第9期2074-2077,2078,共5页Transactions of China Electrotechnical Society

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

摘　　要：导电的永磁体暴露于谐波磁场时,会产生涡流及损耗。提高永磁体的电阻率是减小其涡流的最直接方法。但是,在高速永磁交流电机中,涡流不仅存在于永磁体中,也存在于转子的金属保护套及铜屏蔽层中。在此条件下,提高永磁体的电阻率是否仍然有效?本文将通过有限元分析与对比研究,来探讨这个问题。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.

关 键 词：高速电机 永磁交流电机 转子涡流损耗 永磁体电阻率 保护套 铜屏蔽层 

分 类 号：TM34[电气工程—电机]