关键词: 六相感应电机, 断相故障, 容错控制, 比例积分控制

Abstract: A fault tolerant control strategy was proposed and improved for the problem of high torque ripple, high harmonic content and lower reliability after open-circuit fault of the traditional six-phase induction machine.A unified mathematical model under open-circuit fault was derived.The proportional integral controller was introduced into the harmonic plane, and the field oriented control based on themathematical model was established.The simulation and experimental study were carried out with the open-circuit of one phase, two phase and three phase stator winding respectively.The results showed that the fault-tolerant control strategy can effectively reduce the torque ripple and current harmonics after open-circuit fault，and achieve the fault-tolerant operation after open-circuit failure.

Key words: six-phase induction machine, open-circuit fault, fault-tolerant control, PI control