Finite Element Calculation of Radial Electromagnetic Force of Permanent Magnet Synchronous Motor

This paper analyzes the radial electromagnetic force of external rotor permanent magnet motor. First, The order and frequency characteristics of radial electromagnetic force of 72 slot 30 pole outer rotor permanent magnet motor are analyzed and calculated, and verified by finite element simulation. Compare with the natural frequency of the rotor part of the motor to determine whether the radial electromagnetic force is likely to cause resonance.