补偿电流注入的永磁同步电机转矩脉动抑制方法  

Torque Ripple Suppression Method for Permanent Magnet Synchronous Motors Based on Compensated Current Injection

作　　者：钱强 闫丽华[1] Qian Qiang;Yan Lihua(Beijing Normal University Zhuhai Branch School,Zhuhai Guangdong 519087,China)

机构地区：[1]北京师范大学珠海分校

出　　处：《电气自动化》2019年第6期1-3,73,共4页Electrical Automation

基　　金：广东省教育厅重大科研项目(2017KQNCX241)

摘　　要：采用PWM技术后,在永磁同步电机中可能产生刺耳的电磁噪声,同时PWM谐波电流引起电机转矩脉动、涡流损耗增加及产生电磁干扰等问题。利用Maxwell有限元仿真,对永磁同步电机的定位转矩谐波分析,找出定位转矩中幅值较大的基波和主要谐波分量。通过注入补偿电流产生的转矩抵消定位转矩中的基波与二次谐波分量,从而达到抑制永磁同步电机转矩脉动的目的,仿真结果表明了方法的有效性。Adoption of PWM technology might bring harsh electromagnetic noise to permanent magnet synchronous motors.Moreover,PWM harmonic current would cause motor torque ripple,increase of eddy current loss and electromagnetic interference.Maxwell finite element simulation was used to analyze the positioning torque harmonics of the permanent magnet synchronous motor and find fundamental waves with large amplitude and main harmonic components in the positioning torque.The torque produced through injection of compensation current was used to offset the fundamental waves and secondary harmonic components in the positioning torque,so that the torque ripple of the permanent magnet synchronous motor might be suppressed.Simulation results verified the validity of the proposed approach.

关 键 词：永磁同步电机 定位转矩 补偿电流注入 转矩脉动 谐波 反电动势 

分 类 号：TM341[电气工程—电机]