Model predictive current control based on a six-phase stationary coordinate system for fault-tolerant permanent magnet rim-driven motor

Aiming at the defects of the large calculation, complex fault-tolerant control strategy, and large pulsation of motor torque in the application of the traditional model predictive current control of a six-phase fault-tolerant permanent magnet rim-driven motor, this paper presents a model predictive current control method based on a six-phase stationary coordinate system. Under a fixed sampling frequency, a set value of a six-phase stator current is calculated using the rotor position, rotation speed at the present moment, and the fault-tolerant control strategy. Further, the six-phase current is predicted independently in two rounds under the six-phase stationary coordinate system. By optimizing the value function, the optimal switch combination for the six-phase H-bridge inverter circuit is determined to realize model predictive current control for the six-phase fault-tolerant permanent magnet rim-driven motor. The results show that the proposed model predictive current control method based on a six-phase stationary coordinate system has such advantages as its being simple and fault-free and the small pulsation of the motor torque. In addition, the method considered the fast dynamic response feature of traditional model predictive current control algorithms. © 2024 Editorial Board of Journal of Harbin Engineering. All rights reserved.