Performance Evaluation of Vernier Motor with a Consequent Pole Rotor

Abstract

　This paper investigates a vernier motor with a consequent pole rotor which reduces the permanent magnet volume and increases the productivity, compared with a surface permanent magnet (SPM) rotor. The consequent pole design may cause the reduction of the output torque and increase of the torque ripple due to the unbalanced flux density between the permanent magnet pole and consequent pole. The performance comparison between these designs is implemented by 2-D finite element analysis and measurements on a prototype.