The permanent magnet motor with high power density and easy to maintain

it has been widely used in industrial production and daily life. Permanent magnet motor design optimization is important for reducing the cost of the permanent magnet and conserving resources. In this paper

the main achievement of surface mount type permanent magnet motor design optimization through three methods

oblique-pole rotor can significantly reduce the cogging torque of the motor

sinusoidal-rotor can reduce torque ripple of the motor rotor

third harmonic injection reduce torque ripple

it is also possible to further improve the torque density of the motor.