作者：郭建英1, 赵宏平2
作者单位：1. 忻州职业技术学院机电系，山西 忻州 034000;
2. 苏州职业大学机电工程学院，江苏 苏州 215104
关键词：永磁电机;转矩脉动抑制;谐波注入;齿槽转矩;反电动势谐波
摘要：
为解决多相永磁电机的转矩脉动问题，该文基于解析法、仿真以及实验的方法，提出一种抑制该类电机转矩脉动的方法。该文首先推导适用于任意相电机反电动势谐波和齿槽转矩引起的脉动转矩的通用解析表达式。然后，基于此模型，从控制的角度出发，提出通过采用电流谐波注入以补偿齿槽转矩和反电动势谐波的控制策略，分析所需注入的电流谐波特性的一般表达式。为验证所提出方法的有效性，以一台三相12槽10极表贴式永磁同步电机为例，通过Matlab/Simulink设计同时考虑反电动势谐波和齿槽转矩的电机仿真模型，搭建基于谐波注入的电机控制系统。此外，为进一步验证所提出的方法正确性，文章也进行相应的实验验证。研究结果表明：补偿前后电机的转矩脉动峰峰值从1.5 N·m降低到0.5 N·m，转速波动从±2.5 r/min降低到±0.7 r/min。
Torque ripples reduction in permanent magnet machines based on current harmonics injection
GUO Jianying1, ZHAO Hongping2
1. Machinery & Electric Department, Xinzhou Vocational & Technical College, Xinzhou 034000, China;
2. School of Mechanical and Electrical Engineering, Suzhou Vocational University, Suzhou 215104, China
Abstract: In order to solve the torque ripple problem of multi-phase permanent magnet motors, this paper proposes a method to suppress the torque ripple of this type of motor based on analytical, simulation and experimental methods. In this paper, the analytical model of torque ripples caused by the harmonics of back-EMF and cogging torque is derived. Then, based on this model, the current harmonics injection technique is employed to reduce the cogging torque and back-EMF harmonics. Meanwhile, the general equation of injected current is also analyzed. In order To verify the effectiveness of the proposed method, a 12-stator-slot/10-rotor-pole surfaced mounted PM machine is set as an example. The Matlab/Simulink is used to model the 12/10 machine, taking both the back-EMF harmonics and cogging torque into consideration. In addition, in order to further verify the correctness of the proposed method, the paper also carried out corresponding experimental verification. It is found that the peak to peak torque ripple of the motor before and after compensation is reduced from 1.5 N·m to 0.5 N·m, and the speed fluctuation is reduced from ±2.5 r/min to ±0.7 r/min.
Keywords: permanent magnet motor;torque ripple reduction techniques;current harmonics injection;cogging torque;back-EMF harmonics
2022, 48(4):47-52,52 收稿日期: 2021-02-28;收到修改稿日期: 2021-05-13
基金项目:
作者简介: 郭建英（1975-），女，山西忻州市人，讲师，硕士，主要研究方向为控制理论与控制工程、电力电子电路
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