电气工程学报 ›› 2021, Vol. 16 ›› Issue (1): 9-15.doi: 10.11985/2021.01.002

• 电机与电器 • 上一篇    下一篇

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基于谐波提取器的永磁同步电机谐波抑制方法 *

金石(), 朱熙(), 金无痕(), 张凤阁()   

  1. 沈阳工业大学电气工程学院 沈阳 110870
  • 收稿日期:2020-10-10 修回日期:2021-01-29 出版日期:2021-03-25 发布日期:2021-03-25
  • 作者简介:金石,女,1981年生,博士,教授,博士研究生导师。主要研究方向为特种电机及其控制。E-mail:jinshi@sut.edu.cn
    朱熙,男,1994年生,硕士研究生。主要研究方向为电力电子与电力传动。E-mail:2596760872@qq.com
    金无痕,男,1993年生,博士研究生。主要研究方向为电机控制技术。E-mail:2667531258@qq.com
    张凤阁,男,1963年生,博士,教授,博士研究生导师。主要研究方向为特种电机及其控制。E-mail:zhangfg@sut.edu.cn
  • 基金资助:
    * 国家自然科学基金(51877139);辽宁省“百千万人才工程”;沈阳市中青年科技创新人才支持计划(RC190377)资助项目

Harmonic Suppression Method of Permanent Magnet Synchronous Motor Based on Harmonic Extractor

JIN Shi(), ZHU Xi(), JIN Wuhen(), ZHANG Fengge()   

  1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870
  • Received:2020-10-10 Revised:2021-01-29 Online:2021-03-25 Published:2021-03-25

摘要:

永磁同步电机(Permanent magnet synchronous motor, PMSM)在运行时由于受到逆变器的非线性因素影响导致电机定子电流产生谐波,使电机产生额外损耗。由于传统PI(Proportion integration, PI)控制器不能无静差跟踪交流信号,会导致谐波检测精度不高。针对这种问题,提出一种基于正、负序基波提取器的谐波检测结构,该结构可以无静差跟踪谐波交流量。通过对角速度进行设置得到谐波提取器,分别提取5次负序谐波和7次正序谐波,并将其作为补偿量注入到电流环PI控制器的输出电压中,降低电机定子绕组电流的谐波含量。仿真结果表明,基于正、负序谐波提取器的PMSM谐波抑制策略可以有效抑制电机定子电流谐波。

关键词: 永磁同步电机, 定子电流谐波抑制, 谐波提取器

Abstract:

Permanent magnet synchronous motor (PMSM) is affected by the non-linear factors of the inverter during operation, causing the motor stator current to produce harmonics, which causes the motor to generate additional losses. Because traditional proportion integration (PI) controllers cannot track AC signals without static errors, the accuracy of harmonic detection will not be high. In response to this problem, a harmonic detection structure based on positive and negative sequence fundamental wave extractors is proposed, which can track the harmonic AC quantity without static error. The harmonic extractor is obtained by setting the angular velocity, which extracts the 5th negative sequence harmonics and the 7th positive sequence harmonics respectively, and injects them into the output voltage of the current loop PI controller as a compensation amount to reduce the harmonic content of motor stator winding current. The simulation results show that the PMSM harmonic suppression strategy based on positive and negative sequence harmonic extractors can effectively suppress the motor stator current harmonics.

Key words: Permanent magnet synchronous motor, stator current harmonic suppression, harmonic extractor

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