基于PI的永磁同步电机转矩脉动抑制研究  

Torque Ripple Suppression Strategy of Permanent Magnet Synchronous Motor Based on PI Controller

作　　者：郑博元[1] 张荣建[1] 胡建辉[1] 徐永向[1] 

机构地区：[1]哈尔滨工业大学电气工程系,哈尔滨150001

出　　处：《微电机》2016年第7期32-34,67,共4页Micromotors

基　　金：国家科技重大专项资助(2012ZX04001-051)

摘　　要：永磁同步电机由于具有高效率、高转矩密度等优点而被广泛应用于各种要求高性能伺服控制的场合,但是其转矩存在较大脉动,限制了永磁同步电机在高精度场合的应用。所以研究永磁同步电机的转矩脉动抑制策略有着重要意义。在分析永磁同步电机系统结构和工作原理的基础上,建立了永磁同步电机的基波与谐波的数学模型,进而推导出基波与谐波的共同作用下电磁转矩的表达式,说明转矩脉动主要由6次分量与12次分量组成。以此为基础提出了一种基于PI控制器的转矩脉动抑制方法,通过向q轴注入额外的谐波电流,以抑制电机的转矩脉动。最后通过Matlab/Simulink仿真验证了此算法的有效性。The permanent magnet synchronous motors（ PMSM） are widely used in many high-quality servo control situations because of their advantages of high efficiency and torque density. But their high torque ripple sets limits to their application in high precision occasions. So the study of torque ripple suppression is of great significance. This paper built the mathematical model of fundamental and harmonic waves of PMSM based on its structure and operating principle. Then derived the formula of electromagnetic torque resulted from the fundamental and harmonic waves,illustrating that the sixth and twelfth torque ripple are the main component of torque ripple. Based on that,this paper came up with a torque ripple suppression using PI controller by injecting harmonic current to q-axis. In the end,Matlab / Simulink simulation results demonstrate that the proposed strategy is effective.

关 键 词：永磁同步电机 谐波电流注入 转矩脉动 

分 类 号：TM351[电气工程—电机] TM341