Reduced Order Model Open Field Analysis of Surface Mounted Permanent Magnet Motor

This paper, a reduced order subdomain analytical method is proposed to solve the no-load air gap magnetic field of permanent magnet motor. The air gap permeance model of single slot motor is established and determines its relationship with the magnetic field of the motor; the air gap magnetic field of single slot motor and slotless motor is obtained respectively. The magnetic field of single slot motor is superposed by phase, combined with the magnetic field of slotless motor, the global air gap magnetic field model of permanent magnet motor is generated, and the dimension of the coefficient matrix is reduced. By comparing the analytical results with the finite element results, the correctness and reliability of the method are proved.