永磁同步电机转矩脉动抑制方法  

Torque Ripple Control Method for Permanent Magnet Synchronous Motor

作　　者：汪丹妮 罗建[1] 马鸿泰 金志辉 赵焕 WANG Danni;LUO Jian;MA Hongtai;JIN Zhihui;ZHAO Huan(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;School of Electronics and Information,Jiangsu University of Science and Technology,Zhenjiang 212013,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444 [2]江苏科技大学电子信息学院,江苏镇江212013

出　　处：《电机与控制应用》2019年第4期15-21,共7页Electric machines & control application

基　　金：国家重点研发计划项目(2017YFB0103600)

摘　　要：分数槽集中绕组永磁同步电机被广泛用于伺服控制系统。由于电机极槽配合以及制造过程中机械加工与装配误差等因素,所以永磁同步伺服电机输出转矩中会存在固有的周期性转矩脉动,影响伺服系统实现高精度的速度与位置跟随。因此,采用转矩观测器来估计由上述原因造成的转矩脉动,再将转矩脉动与位置信号通过一定处理,计算出相应的前馈转矩电流,补偿到电流指令端,对转矩脉动进行抑制,从而减小转速脉动。通过仿真和试验验证了抑制方法的有效性。In recent years, permanent magnet synchronous motors with concentrated winding and fractional slot had been widely used in servo control systems. Cyclic torque pulsation, which was detrimental to the speed and position regulation of a high performance servo system, existed in such type of motors due to pole-slot combinations and imperfections in manufacturing such as mechanical errors introduced during parts machining and assembly. Therefore, an observer based torque ripple estimation and mitigation scheme was developed. Torque observer was adopted to estimate the torque ripple, and then torque ripple and position signal were processed to calculate the corresponding compensation torque current, which was in turn fed-forward to the current command to suppress the resultant speed pulsation. Simulation and experiment results were obtained to verify the effectiveness of this method.

关 键 词：永磁同步电机 转矩脉动 转速脉动 齿槽转矩 转矩观测器 转矩前馈补偿 

分 类 号：TM351[电气工程—电机] TM921.2