基于相位分析的双定子低速大转矩永磁同步电动机转矩脉动研究  

Torque Ripple Analysis of Dual-Stator Surface Mounted Low-Speed High-Torque Permanent Magnet Synchronous Motors Based on Phase Analysis

作　　者：鲍晓华[1] 朱然 刘佶炜 李仕豪 Bao Xiaohua;Zhu Ran;Liu Jiwei;Li Shihao(School of Electrical Engineering and Automation Hefei University of Technology,Hefei 230009 China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电工技术学报》2022年第22期5660-5669,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51977055);安徽省重大科技项目(201903a05020042)资助。

摘　　要：针对双定子低速大转矩永磁同步电动机的转矩脉动问题,该文基于相位分析研究了内外定子槽数配合以及内外定子相对位置对双定子永磁同步电动机转矩脉动的影响。利用叠加原理,将整个电机分为两个部分,即内、外两个电机分开研究转矩脉动。在内外定子槽数不同的情况下,通过分析反电动势,发现谐波的绕组系数正负性会对内外电机反电动势的相位产生影响,基于此,对内外电机反电动势相位进行了预测,并进一步预测内外电机各自的纹波转矩相位,分析了内外电机纹波转矩相位对整个电机纹波转矩的影响。在内外定子槽数相同时,基于电动势和电流的转矩模型,论证了内外定子A相轴线的相对位置会影响整个电机的转矩脉动大小。通过有限元仿真,验证了以上的理论预测。For the torque ripple of dual-stator low-speed high-torque permanent magnet synchronous motor,this paper studies the influence of the slot number combinations and the relative position of inner and outer stators on the torque ripple of dual-stator permanent magnet synchronous motor based on the phase analysis.The whole motor is divided into inner and outer motors by the superposition principle,and the torque ripple is studied separately.When the slot numbers of the inner stators and outer stators are different,by analyzing the back EMF,it is found that the positive and negative harmonic winding factors will affect the phases of the back EMF of the inner and outer motors.Based on this,the phases of the back EMF of the inner and outer motors are predicted,the respective ripple torque phases of the inner and outer motors are further predicted,and the influence of the inner and outer motors’ripple torque phases on the whole motor ripple torque is analyzed.When the slot numbers of the inner and outer stators are the same,based on the torque model of the back EMF and currents,it is demonstrated that the relative positions of the A-phase axis of the inner and outer stators will affect the torque ripple of the whole motor.The finite element simulation verifies the above theoretical predictions.

关 键 词：双定子低速大转矩永磁同步电动机 转矩脉动 叠加原理 反电动势 相位分析 

分 类 号：TM351[电气工程—电机]