Fault Diagnosis and Fault‐Tolerant Control Strategies for Highly Reliable Electric Drive System Based on Dual‐Winding Fault‐Tolerant Permanent Magnet Motor

ABSTRACT To achieve high performance, the electric drive system in aerospace equipment is becoming increasingly critical. This paper proposes a highly reliable electric drive system based on the dual‐winding fault‐tolerant permanent magnet motor (DFPMM). The proposed drive system offers the advantage of requiring fewer additional components and achieving high utilization after fault occurs. For this proposed drive system, a robust fault diagnosis and fault‐tolerant control strategy are presented. The proposed fault diagnosis strategy, based on processing acquired current signals, enables rapid and accurate diagnosis and localization of open‐circuit (OC) faults in windings or power switches within the system. Crucially, it exhibits strong robustness, preventing misdiagnosis under conditions such as no‐load, light‐load, or torque/speed transients. The proposed fault‐tolerant control strategy is based on the principle of constant magnetic flux. By removing the faulty phase and activating the neutral point switch, the current of the remaining phases is reconstructed, thereby enabling the DFPMM to operate fault‐tolerantly. Simulation and experimental outcomes confirm the accuracy and efficacy of the proposed fault diagnosis and fault‐tolerant control methods.