基于双重傅立叶变换的永磁转子涡流损耗分析  

Rotor eddy current loss analysis of permanent magnet rotor based on double Fourier transforms

作　　者：张涛[1,2] 朱熀秋[1] 孙晓东[1] 杨泽斌[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]淮阴工学院电子与电气工程学院,江苏淮安223003

出　　处：《江苏大学学报（自然科学版）》2013年第1期66-71,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家"863"计划项目(2007AA04Z213);国家自然科学基金资助项目(60974053);江苏高校优势学科建设工程项目(苏政办发[2011]6号)

摘　　要：为了优化永磁转子结构,降低转子涡流损耗,分析了表面贴式高速永磁同步电机气隙磁场齿槽效应产生的转子涡流损耗.研究了表面贴式永磁同步电机转子永磁体磁化模式,建立了永磁同步电机转子涡流损耗数学模型,分析了永磁同步电机静态气隙磁场,提取气隙磁场样本数据.采用双重傅里叶变换,研究和比较了四极永磁同步电机永磁体在Halbach磁化和平行磁化时,由齿槽效应引起的气隙磁场时空谐波和对应的转子涡流损耗,并采用瞬态有限元法计算了空载时的转子涡流损耗.结果表明:永磁体采用Halbach磁化模式,能够有效降低气隙磁场高次谐波,转子涡流损耗约为平行磁化时的34%.To optimize the permanent magnet rotor structure and reduce the rotor eddy current loss, the rotor eddy current loss generated by slot effect of air-gap magnetic field in surface-mounted high-speed permanent magnet synchronous motor was analyzed. The magnetization models of permanent magnets were investigated to establish the eddy current loss mathematic models of permanent rotor. The air-gap magnetic field data samples were extracted based on the air-gap magnetic field static analysis. For permanent magnets with parallel magnetization or Halbach magnetization, the air-gap magnetic field space, time har- monics and the corresponding eddy current loss caused by air-gap permeance variation were investigated by double Fourier transforms. The eddy current loss was calculated by transient finite element analysis at non-load state. The results show that the permanent magnet rotor with Halbach magnetization mode can effectively reduce the high order harmonics, and the rotor eddy-current loss is 34% of that with parallel magnetization.

关 键 词：永磁同步电机 高速电机 涡流损耗 傅里叶变换 瞬态有限元法 

分 类 号：TM341[电气工程—电机]