Single-phase fault tolerance control method for axial magnetic field flux switching permanent magnet motor

The invention discloses a single-phase fault tolerance control method for an axial magnetic field flux switching permanent magnet motor, so that an AFFSPMM can operate in a position-sensor-free fault-tolerant state when a single-phase fault occurs, and the loading capacity of the motor is improved through torque redistribution. A control system predicts flux linkage control through a double-vector model, and position angle and rotating speed detection is carried out through a sliding-mode observer. When the motor operates normally, an inverter works in a double-three-phase three-bridge-arm mode; when a single-phase open-circuit fault occurs, the fault stator inverter works in a three-phase four-bridge-arm mode for fault-tolerant control, copper loss is reduced through torque redistribution, and meanwhile, the loading capacity under a motor fault is improved. By combining the structural characteristics of the AFFSPMM, the rotating speed and the torque output performance of the motor are not changed before and