四相永磁容错电机短路故障容错策略

四相永磁容错电机采用被容错齿隔开的集中式绕组结构,本质上具有一定的容错能力和故障出现后连续运行的能力.针对H桥和星形这两种驱动拓扑结构,在发生单相绕组出线端部短路时,以容错控制后的转矩满足正常需求为目标,分别采用直接转矩补偿方法和旋转磁动势不变方法进行容错控制;对两种容错控制策略进行了推导和对比分析,并对相关结果进行了磁-路联合仿真计算,验证了理论分析的正确性.

Two short-circuit fault tolerant strategies for four-phase permanentmagnet fault-tolerant machine

The four-phase permanent-magnet fault-tolerant motor is designed with a degree of inherent fault-tolerant capability and continuous operation in the occurrence of faults, due to their concentrated windings and interleaved by faulttolerant teeth. According to H-bridge and star-connection topologies, the direct torque compensation method and invariance of rotating magnetic force method are respectively adopted, so as to keep torque performance invariant pre- or post-fault operation for single short-circuit winding. Both the strategies are derived, compared and analyzed. Finally, the field-circuit simulation results are given to show the effectiveness of the theoretical analysis.