单磁极加长降低表贴式永磁电机齿槽转矩  

Single Magnetic Pole Lengthening to Reduce the Cogging Torque of the Surface-Mounted Permanent Magnet Motor

作　　者：黄厚佳 李全峰[1,2] 徐余法[1,3] 黄苏融 HUANG Houjia;LI Quanfeng;XU Yufa;HUANG Surong(School of Electrical Engineering, Shanghai Dianji University, Shanghai 201306, China;School of Mechatronics and Automation, Shanghai University, Shanghai 200072, China;Shanghai Polytechnic University, Shanghai 201209, China)

机构地区：[1]上海电机学院电气学院,上海201306 [2]上海大学机电自动化工程学院,上海200072 [3]上海第二工业大学,上海201209

出　　处：《电机与控制应用》2018年第12期55-59,92,共6页Electric machines & control application

基　　金：国家科技支撑计划课题(2015BAG03B00)

摘　　要：针对表贴式永磁电机存在的齿槽转矩问题,提出运用单磁极加长的方法来降低电机齿槽转矩。运用解析法推导出电机单磁极加长后齿槽转矩解析表达式,通过傅里叶分析,得到对电机齿槽转矩具有重要影响的变量B_(r(vz))。引入磁极加长系数η,研究如何选取η的数值削弱齿槽转矩。通过有限元仿真验证了所提方法的有效性。结果表明:通过合理选取磁极加长系数,将与齿槽转矩关键谐波分量有关的B_(r(vz))削减为零可有效降低电机齿槽转矩。For the problem of cogging torque existing in surface-mounted permanent magnet (SPM) motor, a method of single magnetic pole lengthening was proposed to reduce the cogging torque. The analytical expression of the cogging torque was derived by the analytic method when the single magnetic pole of the motor was lengthened and the variable B r( vz ) which had an important influence on the cogging torque was obtained through Fourier analysis. The magnetic pole lengthening factor η was introduced and the way to choose the value of η to reduce the cogging torque was studied. The availability of the method was validated by finite element simulation. It was found that the cogging torque of SPM motor could be effectively reduced when the B r( vz ) related to the key harmonic components of the cogging torque was reduce to zero by reasonably selecting the magnetic pole lengthening factor.

关 键 词：表贴式永磁电机 单磁极加长 齿槽转矩 傅里叶分析 有限元仿真 

分 类 号：TM351[电气工程—电机]