基于槽口偏移的永磁电机齿槽转矩削弱方法  

A Method for Reducing Cogging Torque by Slot-Opening Shift in Permanent Magnet Motors

作　　者：黄守道[1] 刘婷[1] 欧阳红林[1] 高剑[1] 

机构地区：[1]湖南大学电气与信息学院,长沙410082

出　　处：《电工技术学报》2013年第3期99-106,共8页Transactions of China Electrotechnical Society

基　　金：国家国际科技合作项目(2011DFA62240);国家"十二五"科技支撑计划重点项目(2012BAZ02072);湖南省国际科技合作(2011WK2012)资助项目

摘　　要：齿槽转矩是永磁同步电机设计研究的一个重要方面。本文运用傅里叶级数的方法分析了齿槽转矩的表达式,电机的齿槽转矩为电机各槽产生齿槽转矩的叠加,以此为基础对单个槽产生齿槽转矩的叠加规律进行了研究,提出了一种基于槽口偏移削弱齿槽转矩的方法。研究表明,通过本文方法将电机的槽口偏移适当角度,可以抵消电机齿槽转矩中的某次或者几次谐波,给出了具体槽口偏移角度的确定公式。最后通过计算实例运用有限元仿真进行验证,结果表明该方法可有效地削弱永磁电机齿槽转矩,本文的结论正确有效。Cogging torque is an important aspect of permanent magnet （PM） generator design. In this paper, the cogging-torque waveform results due to a single slot and the synthesized waveform result due to slots are studied based on the Fourier analysis. A method of slot-opening shift to reduce cogging torque of permanent magnet machine is presented. The results show that, several lower-order harmonics of cogging torque could be eliminated by the method of slot-opening shift. The method to obtain the slot-opening shift angles is given. At last the method is verified by finite element method. The results verify that the cogging torque can be greatly reduced by this method and the conclusions are validated.

关 键 词：永磁电机 傅里叶级数 齿槽转矩 槽口偏移 有限元法 

分 类 号：TM351[电气工程—电机]