基于增强型扰动观测器的五相永磁同步电机鲁棒电流控制策略

doi:10.19595/j.cnki.1000-6753.tces.181814

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摘要同步坐标系下比例积分（PI）控制性能易受参数摄动、转子永磁体谐波磁链以及逆变器死区效应等扰动的影响,限制了其在高性能驱动系统中的应用。为此,该文首先对五相永磁同步电机驱动系统中的扰动进行了特征分析和建模。分析表明,电机驱动性能主要受到系统中的低频和周期扰动影响。其次,设计一个增强型扰动观测器,同时对系统内的低频和周期扰动进行估计,并通过内部反馈通道对扰动进行补偿。再次,对扰动观测器参数的设计进行理论分析并给出参数设计方法。最后,实验结果表明,该文所提方法提高了PI控制器对参数摄动的鲁棒性,并有效抑制了由周期扰动引起的低次谐波电流。

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	熊聪
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关键词 ：五相永磁同步电机, 周期扰动, 增强型扰动观测器, 比例积分控制, 鲁棒性

Abstract：The dual synchronous rotating frame proportional integral (PI) control is most frequently employed in five-phase permanent magnet synchronous motor drives. However, its control performance is easily affected by disturbances such as parameter perturbation and inverter nonlinearity. Due to the limited bandwidth of the PI controller, there is usually a low-order harmonic current caused by the dead time of the inverter in the stator current. Therefore, this paper proposes a proportional integral control method based on the enhanced disturbance observer (EDOB-PI). The disturbances existing in the five-phase permanent magnet synchronous motor are classified and modeled. Then a disturbance observer is designed to observe the disturbance. Finally, the disturbance is compensated by the feed-forward channel. This method can improve parameter perturbation robustness and suppress low-order harmonic current caused by dead time and harmonic rotor permanent magnet flux. The experimental results have verified the proposed method.

Key words： Five-phase permanent magnet synchronous motor harmonic disturbance enhanced disturbance observer proportional-integral (PI) control robustness

收稿日期: 2018-11-20 出版日期: 2020-03-27

PACS:

TM351

通讯作者: 许海平男,1973年生,研究员,博士生导师,研究方向为电力电子技术、交流电机与变频调速、电动汽车。E-mail: hpxu@mail.iee.ac.cn

作者简介: 熊聪男,1991年生,博士研究生,研究方向为多相永磁同步电机驱动控制。E-mail: xiongcong@mail.iee.ac.cn

引用本文:

熊聪, 许海平, 关涛, 周鹏. 基于增强型扰动观测器的五相永磁同步电机鲁棒电流控制策略[J]. 电工技术学报, 2020, 35(6): 1219-1230. Xiong Cong, Xu Haiping, Guan Tao, Zhou Peng. A Robust Current Control Scheme for Five-Phase Permanent Magnet Synchronous Motor Based on Enhanced Disturbance Observer. Transactions of China Electrotechnical Society, 2020, 35(6): 1219-1230.

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