Development of a Fault-Tolerant Permanent-Magnet Synchronous Motor

The failure of the motor or controller of a motor servo system could lead to terrible casualties and property loss in fields such as aviation and transportation. Current research mainly focuses on the algorithm for fault-tolerant control and the topological structure of hardware. Such approaches may reduce the system frequency through the use of a complex algorithm or increase the system cost through the use of special components. The present paper proposes and tests a multi-redundant, permanent-magnet synchronous motor. Through the parallel connection of multiple independent windings and a supporting control method that controls each redundancy separately, the system continues to run even when the winding or controller of one redundancy suffers an open-circuit or short-circuit fault. The system controller is easy to build and minimize without special components and does not require additional algorithms.