The invention discloses a high-winding-factor permanent
magnet brushless motor and a design and fault-tolerant control method. The high-winding-factor permanent
magnet brushless motor comprises a
stator, an armature winding, a rotor and a permanent
magnet, wherein an armature groove is formed in the
stator, and the armature winding is placed in the armature groove; double-layer winding is adopted. An air gap is arranged between the
stator and the rotor, and a permanent magnet is attached to the surface of the rotor, and is magnetized by using a
Halbach array structure. The motor is an eight-phase motor, and phases are evenly distributed at a phase belt angle of 45 degrees; after the phases are distributed, four
phase line terminals and a common neutral point are led out. The single-phase open-circuit fault-tolerant
algorithm of the motor of the invention solves the problem that the fault-tolerant
algorithm can be implemented only by utilizing the phase which and the fault phase has a difference of 180 degrees when the ordinary four-phase motor is in a single-phase open-circuit fault state, and the capacity of an
inverter and the insulation rating of the motor winding can be reduced by the fault-tolerant control strategy of the motor. Finally, the motor of the invention and the
control algorithm have good fault-tolerant effects, and the average torque after
fault tolerance is basically consistent with that in the normal operation.