基于四桥臂逆变器的PMSM断相容错控制策略  

Fault-tolerant Control Strategy of PMSM Phase Failure Based on Four-bridge Inverter

作　　者：袁高龙 向保林[1] 徐光辉[2] YUAN Gaolong;XIANG Baolin;XU Guanghui(Transmission and Distribution Training Department,Wuhan Electric Power Vocational and Technical College,Wuhan 430070,Hubei,China;School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,Hubei,China)

机构地区：[1]武汉电力职业技术学院输配电培训部,湖北武汉430070 [2]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《电气传动》2021年第22期34-41,共8页Electric Drive

基　　金：国家自然基金资助项目(61473116)。

摘　　要：为了保证永磁同步电机(PMSM)断相后系统能够安全可靠运行,针对三相PMSM提出了基于四桥臂逆变器的PMSM断相容错控制策略。首先,根据断相后绕组电压、电流之间的关系构建三相PMSM断相数学模型,解算出断相PMSM的输入、输出方程。其次,构建电压/电流坐标变换矩阵,将故障前d,q轴电压/电流参考值转换为剩余两相的相电压/电流参考值。最后,利用基于载波的PWM来驱动断相的PMSM,从而实现电机的容错控制。实验结果表明:与无容错和具有电压前馈补偿策略相比,提出的容错策略具有更好的稳态特性,且具有较低的总谐波失真。In order to ensure that the permanent magnet synchronous motor(PMSM)can safely and reliably operate the system after phase failure,for a three-phase PMSM,a PMSM phase failure fault-tolerant control strategy was proposed based on the four-leg inverter.First,a three-phase PMSM phase failure mathematical model was constructed to solve the input and output equations of the phase failure PMSM,according to the relationship between the winding voltage and current after phase failure.Second,a voltage/current coordinate transformation matrix was constructed to convert the d,q axis voltage/current reference value before the fault to the phase voltage/current reference value of the remaining two phases.Finally,the carrier-based PWM was used to drive the phase-off PMSM,thereby to achieve fault-tolerant control of the motor.The experimental results show that the fault-tolerant strategy proposed has better steady-state characteristics and lower total harmonic distortion than the fault-tolerant and voltage feed-forward compensation strategies.

关 键 词：断相故障 永磁同步电机 容错 坐标变换矩阵 四桥臂 

分 类 号：TM351[电气工程—电机]