Model Predictive Current Control of Fault-Tolerant Permanent Magnet Rim Drive Motor Based on Six-Phase Stationary Coordinate System

Aiming at the problems of large computation and complex fault-tolerant control strategy in the application of traditional model predictive current control (MPCC) strategy for six-phase fault-tolerant permanent magnet rim drive motor (FTPM-RDM), a six-phase stationary coordinate system based MPCC (SPSCS-MPCC) strategy is proposed. At a fixed sampling frequency, the six-phase current is calculated from the current moment rotor position, speed, and fault-tolerant control strategy. Furthermore, the six-phase current is predicted independently in two rounds. The optimal switching combination of the six-phase H-bridge inverter circuit is determined by cost function to achieve the MPCC of the FTPM-RDM. Then, the hardware experimental platform based on StarSim is designed. The experimental results demonstrate that the SPSCS-MPCC proposed in this paper not only has the advantages of a simple algorithm and low motor torque pulsation under fault-free and open-circuit faults but also takes into account the fast dynamic response of traditional MPCC algorithms.