非正弦反电势五相永磁同步电机容错矢量控制*

doi:10.11985/2021.04.014

摘要/Abstract

摘要：

多相永磁同步电机驱动系统具有较强的容错运行能力。以非正弦反电动势五相永磁同步电机为研究对象,在缺一相故障下,通过降阶变换矩阵,分别构建基波和三次谐波空间同步坐标系下的转矩方程;同时,为消除故障后产生的二、四次转矩脉动,分析三次谐波电流注入率选取的方法,并根据最小铜耗及最大转矩原则对参考电流进行优化;针对传统PI控制器无法对交流参考电流进行精确跟踪的问题,在PI控制基础上,设计准比例谐振(Quasi-proportional resonance,QPR) +PI控制器来对同步坐标系下交流参考电流进行精确跟踪。仿真和试验结果表明,转矩脉动得到了有效抑制,并且QPR+PI控制器实现了对交流电流信号的精确跟踪。

关键词: 五相永磁同步电机, 三次谐波电流, 转矩脉动, 容错控制, 准比例谐振控制器

Abstract:

The multi-phase permanent magnet synchronous motor drive system has strong fault-tolerant operation ability. The non-sinusoidal back-EMF five-phase permanent magnet synchronous motor is taken as the research object. By adopting the reduced order transformation matrix, the torque equations at fundamental and the third harmonic space are constructed under the single-phase fault. And in order to eliminate the second and fourth torque ripples under the fault, the method of selecting the third harmonic current injection rate is analyzed, and the reference current are optimized according to the principle of minimum copper loss and maximum torque. In addition, to address the inability of traditional PI controller to track the AC reference current in an accurate way, a Quasi-proportional resonance (QPR) +PI controller is designed on the basis of PI control to ensure the accuracy in tracking the AC reference current in the synchronous coordinate system. The simulation results demonstrate that the torque ripple are effectively suppressed, and the QPR + PI controller can accurately track the AC current signal.

Key words: Five-phase permanent magnet synchronous motor, third harmonic current, torque ripple, fault-tolerant control, quasi-proportional resonant controller

中图分类号:

TM561

周长攀, 刘海峰, 景国秀, 孙向东, 刘坛, 史奔奔. 非正弦反电势五相永磁同步电机容错矢量控制^*[J]. 电气工程学报, 2021, 16(4): 108-119.

ZHOU Changpan, LIU Haifeng, JING Guoxiu, SUN Xiangdong, LIU Tan, SHI Benben. Fault-tolerant Vector Control of Five-phase Permanent Magnet Synchronous Motor of Non-sinusoidal Back EMF[J]. Journal of Electrical Engineering, 2021, 16(4): 108-119.

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参考文献 14

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参数	数值
定子电阻r_s/Ω	0.5
直轴电感L_d1/mH	8.4
交轴电感L_q1/mH	8.4
永磁磁链的基波幅值ψ_f1/Wb	0.32
永磁磁链的三次谐波幅值ψ_f3/Wb	0.020 8
电机极对数n_p	4
直流母线电压U_dc/V	200
转动惯量J/(kg·m²)	0.001 2

三次谐波电流	转矩脉动(%)	转速脉动(%)
注入前	14.06	9.26
注入后	1.68	0.32

三次谐波电流	转矩脉动(%)	转速脉动(%)
注入前	58.2	35.3
注入后	27.0	16.2

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