Concept Design of Surface-mounted Permanent Magnet Vernier Motor Using Flux Modulation Effect by Winding Method

In this paper, the concept design method of surface-mounted permanent magnet vernier motor by the winding method is introduced. Unlike surface-mounted permanent magnet synchronous motor, vernier motor is affected by the gear ratio of the winding pole pair numbers and the rotor pole pairs numbers. Using the air-gap permeance method and each winding method, the rotor pole pair is determined by analyzing the winding magnetomotive force spectra. Then, at a specific operating point with high torque and low speed, each model is designed according to gear ratio in common constraints. Finally, the tendencies of designed models, such as torque density, back electromotive force density, efficiency, and power factor, are studied through finite element analysis.