Fault-Tolerant Control Method for Modular Four-Unit Permanent Magnet Synchronous Hub Machine Utilizing Current Reconstruction

This paper proposes a new modular four-unit permanent magnet synchronous hub machine (MF-PMSHM) with robust fault tolerance to enhance the operational reliability of electric vehicles (EVs). Furthermore, two fault-tolerant control methods based on current reconstruction are specifically introduced to address open-phase faults. Among them, method A aims to minimize the total copper loss and increase the range of EVs; Method B aims to maximize the output torque and increase the load capacity. Lastly, the strong fault tolerance performance of the machine and the efficacy of the two control methods were verified through a 1.1kW laboratory prototype.