Research on Fault-tolerant Operation of Fault-tolerant Permanent Magnet Motor Based on Four-switch Two-phase Fault-tolerant Topology

Abstract

Multi - electric aircraft have attracted more and more attention at domestic and abroad in recent years. As the core component of the more-electric aircraft hydraulic system, the partial energy electric pump determines the performance of the aircraft actuating device. However, for the partial energy pump motor system, electrical faults exist objectively, and after the faults, the system will not run stably. In this paper, a fault-tolerant permanent magnet motor(FTPMM) drive system based on four-switch two-phase (FSTP) fault-toleranttopology is proposed. The principle of fault-tolerant control(FTC) before and after the fault is analyzed by means of constant magnetomotive force, and the FTC strategy for winding open-circuit(OC) and short-circuit(SC) faults of the electric drive system is proposed. Through theoretical research, simulation analysis and verification, It is verified that the FTPMM drive system based on the four-switch two-phase fault-tolerant topology can not only perform FTC for winding OC faults, but also perform FTC for winding SC faults. This improves the reliability of the avionics transmission system.