关键词: 永磁同步电机, 模型预测电流控制, 故障诊断, 容错控制, 电流传感器

Abstract: A model predictive current control-based current sensor fault diagnosis and fault-tolerant control scheme was proposed for faults occurring in the current sensor during the operation of a permanent magnet synchronous motor ( PMSM) system. The controller sequentially traversed eight voltage vectors to obtain the optimal predicted current for the next cycle, which was compared with the measured current of the next cycle to achieve fast diagnosis. The faulty phase current was replaced by the predicted phase current to enable fault-tolerant control after a fault occurs. Simulation results demonstrated the effectiveness and feasibility of the current sensor fault diagnosis and fault-tolerant method in the event of a sudden fault in the current sensor.

Key words: permanent magnet synchronous machine ( PMSM ), model predictive current control ( MPCC ), fault diagnosis, fault-tolerant control, current sensor