采用无差拍电流跟踪的五相梯形反电动势永磁电机开路容错控制

doi:10.19595/j.cnki.1000-6753.tces.200897

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摘要在开路故障下,为了利用五相梯形反电动势永磁电机的3次谐波反电动势,需注入3次谐波电流。此时,静止坐标系下的容错参考电流为交流量,传统比例积分控制器由于带宽的限制,难以准确跟踪交流容错电流,维持系统的平稳运行。为此,该文提出采用无差拍电流跟踪的新型容错控制策略。首先,根据故障后转矩脉动为零的原则获取故障后的容错参考电流,使电机在故障情况下仍能输出平滑的转矩;其次,以欧拉离散的方法构建单相开路、两相开路故障状态下电机的离散模型,利用无差拍方法追踪交变的容错参考电流,为载波脉宽调制提供准确的参考电压;最后,构建驱动实验平台,实验验证所提控制策略的有效性。

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	陈前
	夏雨航
	赵文祥
	刘国海

关键词 ：五相永磁电机, 梯形反电动势, 开路故障, 交变电流, 无差拍

Abstract：When an open-circuit fault occurs, the third harmonic current needs to be injected to utilize the third harmonic back-EMF for the five-phase permanent magnet motor with trapezoidal back EMF. In this case, the fault-tolerant reference current in the static coordinate system is the AC quantity. Due to the bandwidth limitation, the traditional proportional-integral (PI) controller is difficult to track the AC fault-tolerant current accurately, which limits the smooth operation of the system. For this reason, this paper proposes a new fault-tolerant control strategy based on deadbeat current tracking. Firstly, to generate smooth torque under fault condition, the fault-tolerant reference current is obtained according to the principle of zero torque ripple. Secondly, by Euler's discrete method, the discrete models of the motor under single-phase open-circuit and two-phase open-circuit faults are constructed respectively. And then, the deadbeat method is used to track the alternating fault-tolerant reference current, which provides accurate reference voltages for the carrier pulse width modulation (CPWM). Finally, an experimental platform is constructed, and the results verify the effectiveness of the proposed control strategy.

Key words： Five-phase permanent magnet motor trapezoidal back-EMF open-circuit fault alternating current deadbeat

收稿日期: 2020-07-22

PACS:

TM351

基金资助:国家自然科学基金（52077097, 51707083）和江苏省高校优势学科资助项目

通讯作者: 陈前男,1986年生,教授,研究方向为永磁电机设计与控制。E-mail: chenqian0501@ujs.edu.cn

作者简介: 夏雨航男,1996年生,硕士研究生,研究方向为永磁电机控制。E-mail: 1035126613@qq.com

引用本文:

陈前, 夏雨航, 赵文祥, 刘国海. 采用无差拍电流跟踪的五相梯形反电动势永磁电机开路容错控制[J]. 电工技术学报, 2022, 37(2): 368-379. Chen Qian, Xia Yuhang, Zhao Wenxiang, Liu Guohai. Open-Circuit Fault-Tolerant Control for Five-Phase Permanent Magnet Motors with Trapezoidal Back-EMF by Deadbeat Current Tracking. Transactions of China Electrotechnical Society, 2022, 37(2): 368-379.

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