Review on fault diagnosis and active fault tolerant control of permanent magnet synchronous motor drive system

Recently, the permanent magnet synchronous motor (PMSM) drive system has replaced traditional actuators in more and more occasions, especially in some cutting-edge application areas, the reliability and safety of its drive system are very critical, which requires faults after that, it can detect and solve in time, and even continue to run stably with the failure. Therefore, the fault-tolerant control of the motor through the reconstruction of hardware circuits and software algorithms to ensure the undisturbed operation of the system after a fault has become a hot issue in current research. This article focuses on the four main types of inverter faults, stator winding faults, sensor faults, and permanent magnet demagnetization faults that have the highest failure rates in PMSM drive systems. First, the research results of fault detection and diagnosis technology of PMSM drive system under four fault conditions are described. Then, the research status of active fault-tolerant control technology of the PMSM drive system under different fault conditions are summarized. Finally, the future development of the PMSM drive system fault diagnosis and active fault-tolerant control technology is summarized and prospected based on the research status.