近极槽永磁电动机齿顶漏磁对转矩的影响  

Influence of the Zigzag Leakage Flux on Torque in Surface-Mounted PM Synchronous Motors with Similar Number of Poles and Slots

作　　者：夏加宽[1] 彭兵[1] 王成元[1] 董婷[1] 孙宜标[1] 韩桂新[2] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]沈阳职业技术学院机械装备系,沈阳110045

出　　处：《电工技术学报》2012年第11期97-103,共7页Transactions of China Electrotechnical Society

基　　金：辽宁省科技厅重点项目(2010220038);辽宁省自然科学基金(201133029);辽宁省博士启动基金(20111039)资助项目

摘　　要：近极槽数表贴式永磁同步电机的齿顶漏磁比较大,降低了电机的输出转矩,导致电机转矩产生脉动,分析其对转矩的影响十分必要。根据一对极下的齿顶漏磁周期数为相数的偶数倍且关于原点对称的特点,分析了一相下的齿顶漏磁的傅里叶展开式。由法拉第电磁感应定律把齿顶漏磁和三相绕组反电动势联系起来,在此基础上推导出了齿顶漏磁与电磁转矩关系的解析表达式。有限元仿真和定量分析结果表明:齿顶漏磁降低了电机的平均电磁转矩,产生了六次纹波转矩,说明了分析方法的正确性。The zigzag leakage flux of surface-mounted permanent magnetic synchronous machine（PMSM） with similar poleand slot number is bigger than other kinds of electric machines. The bigger zigzag leakage flux decreases the output torque of the electric machines and causes the torque to ripple. Therefore it is important to analyze the influence of zigzag leakage flux on the torque. According to the feature that the periodicity of zigzag leakage flux is the multiple of the phase and the zigzag leakage flux is symmetry about the origin, and the Fourier expansions of zigzag leakage flux under one phase are analyzed. Using Faraday law of electromagnetic induction, the zigzag leakage flux is related to the back electromotive force of three phase windings. Then on this basis the analytical expression of the relationship between the zigzag leakage flux and torque is deduced. The results of the finite element simulation and quantitative analysis indicate that the zigzag leakage flux decreases the average torque of the electric machines and produces six-order torque ripple. Therefore, the analytical method is proved to be correct.

关 键 词：表贴式永磁同步电动机 齿顶漏磁 傅里叶分解 近极槽 电磁转矩 

分 类 号：TM351[电气工程—电机]