Design method of axial magnetic flux permanent magnet brushless direct current motor with unequal-thickness magnetic poles

The invention relates to the technical field of motors, and discloses a design method of an axial magnetic flux permanent magnet brushless direct current motor with unequal-thickness magnetic poles, rotor permanent magnets of the motor are ten unequal-thickness fan-shaped magnetic poles with the same structure, and the upper end face of each unequal-thickness fan-shaped permanent magnet protrudes upwards along the radial direction. The invention provides a design method for the trimming radius of a permanent magnet, and the method comprises the steps: sequentially determining the flux density amplitude of a no-load magnetic field working point, the air gap flux density amplitude, the motor no-load back electromotive force, the motor electromagnetic power and the motor electromagnetic torque through an axial magnetic flux permanent magnet brushless direct current motor mathematical model; and finally, the optimal trimming radius of the permanent magnet is determined according to the torque fluctuation quantity