Model Predictive Torque Control of PMSM System Driven by Three-Phase Eight-Switch Fault-Tolerant Inverter

Abstract

A novel model predictive torque control (MPTC) strategy for a permanent magnet synchronous motor (PMSM) system driven is proposed by three phase eight-switch fault tolerant inverter. The mathematical model of the three phase eight-switch inverter and PMSM is established through the running mode of the driving system; the improved MPTC strategy is used to reduce the complexity of value design, the total harmonic distortion (THD) value of the stator current, the flux and torque ripples. Meanwhile, the fault tolerant control with current feedback characteristics in this paper can effectively suppress the adverse effects on system operation caused by the maldistribution of DC side bus capacitor voltage. The simulation result shows that the method can ensure the reliable and stable operation of the eight switched fault tolerant inverter PMSM system, which not only has good dynamic performance, strong anti-interference and robustness, but also can reduce the switching loss and the total harmonic distortion (THD) value of the stator current.