Research on the application of sliding mode control in fault tolerance of PMSM drive system

To achieve unified fault tolerance for motor faults and inverter faults in Permanent Magnet Synchronous Motor (PMSM) drive systems, a new three-level inverter fault tolerance topology for PMSM drive system faults is proposed. This topology can carry out fault-tolerant control for as many types as possible at a relatively low hardware cost. Accordingly, a fault-tolerant control algorithm is designed based on adaptive sliding mode control to adaptively control the PMSM drive system under normal conditions and various fault conditions. Simulation and experimental results demonstrate the fault tolerance capability of this fault-tolerant topology structure and the superiority of the sliding mode control algorithm.