Fault Diagnosis and Torque Ripple Minimization Control for Modular Permanent-Magnet In-Wheel Motor with Interturn Fault

This paper proposes a fault diagnosis method and a torque minimization control strategy for modular permanent magnet in-wheel motor with interturn fault. Firstly, the module with interturn fault is located based on the fundamental component of zero-sequence voltage component (ZSVC). After the faulty module is located, this module is powered off. Then, in order to reduce the torque ripple caused by interaction between short-circuit current in the faulty module and permanent magnetic field, the proportional-resonant (PR) controller is proposed to be connected in parallel with PI speed controller. Finally, the simulation results verify the effectiveness and compatibility of the proposed fault diagnosis method and the torque ripple minimization control strategy.