基于磁极分段优化的内置式永磁同步电机齿槽转矩削弱方法  

Cogging Torque Reduction of Interior Permanent Magnet Synchronous Motor with Permanent Magnet Segmentation Optimization

作　　者：阮博 谷爱昱[1] 刘海 郭莉 廉迎战[1] RUAN Bo;GU Aiyu;LIU Hai;GUO Li;LIAN Yingzhan(School of Automation,Guangdong University of Technology,Guangzhou 510006,China;Huizhou Zhuoneng Motor Technology Co.,Ltd.,Huizhou 516100,China;Guangzhou Metro Design&Research Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]惠州市卓能电机技术有限公司,广东惠州516100 [3]广州地铁设计研究院股份有限公司,广东广州510010

出　　处：《电机与控制应用》2019年第7期20-25,共6页Electric machines & control application

基　　金：广东省教育部科技部产学研结合项目(2012B090600004);南沙科技计划项目(2017CX011);广州市科技计划项目(201802010045);广东省科技计划项目(2016B090912004)

摘　　要：内置式永磁同步电机的齿槽转矩会带来转矩脉动、电机控制精度变差、振动与噪声等一系列的问题,因此采取有效的削弱齿槽转矩措施至关重要。采用解析计算分析了永磁体径向分段对齿槽转矩的影响,在此基础上提出了一种改进的永磁体分段方法,从而有效地减少永磁体分段后对电机的反电动势和输出平均转矩等性能的影响。此外,基于改进的永磁体非均匀分段方法,还提出了一种永磁体不等厚非均匀分段来削弱齿槽转矩的新方法,并采用有限元法对永磁体均匀分段、非均匀分段和不等厚非均匀分段3种方法进行仿真验证和对比分析。仿真结果表明,采用永磁体不等厚非均匀分段方法的齿槽转矩削弱效果最佳。The cogging torque of the interior permanent magnet synchronous motor brought a series of problems such as torque ripple,motor control accuracy deterioration,vibration and noise,so it was important to take effective measures to weaken the cogging torque.The influence of radial segmenting of permanent magnet on cogging torque was analyzed by analytic calculation.Based on this,an improved segmenting method of permanent magnet was proposed,which could effectively reduce the influence of permanent magnet segmentation on the back electromotive force and output average torque of motor.In addition,based on the improved non-uniform permanent magnet segmentation,a new method of unequal thickness and non-uniform permanent magnet segmentation was proposed.Three methods of uniform permanent magnet segmentation,non-uniform permanent magnet segmentation and unequal thickness and non-uniform permanent magnet segmentation were verified and compared by the finite element method.The simulation results showed that the cogging torque attenuation effect of the new method of unequal thickness and non-uniform permanent magnet segmentation was the best.

关 键 词：内置式永磁同步电机 磁极分段 齿槽转矩 

分 类 号：TM341[电气工程—电机] TM351