Investigation of Fault-Tolerant Performance and Inductance in a Modular Permanent Magnet In-Wheel Motor

This article investigates the fault-tolerant (FT) performance and inductances in a modular permanent magnet (PM) in-wheel motor. First, the working mechanism of the modular FT motor is introduced, and the slot–pole combination with high FT performance for the modular motor is developed. The relationship between the FT performance and the inductance parameters is linked through the magnetic coupling coefficient. Second, the electromagnetic characteristics of the modular in-wheel motor under FT operations from open-circuit (OC) fault and interturn short circuit (SC) are investigated, respectively. The influence of the magnetic coupling coefficient on FT performance is analyzed, and the design requirement of the inductance for this kind of motor is proposed.