Fixed-frequency hysteresis controller for fault-tolerant control of six-phase permanent magnet synchronous motor

The theory, design and implementation of fixed- frequency hysteresis current control of six-phase permanent magnet synchronous motor (PMSM) is presented. Based on the difference between the given current and the actual current value with the loop width, and the algorithm calculates the duty cycle of the turn-on and turn-off states in real-time, The shortcomings of indeterminate switching frequency and large current distortion in traditional hysteresis control was solved by the proposed technique, the fault-tolerant operation of the motor under open- circuit fault can also be guaranteed. Simulation and experimental results are included to show the effectiveness of the proposed current controller.