A high power factor fault-tolerant vernier permanent-magnet machine

Vernier permanent-magnet (VPM) machine offers the advantage of high torque density. However, the existing VPM machines usually suffer from relatively low power factor. To solve the problem, this paper proposes a new high power factor fault-tolerant VPM machine. Compared with the existing one, the proposed VPM machine has higher power factor and higher torque density. Also, the fault-tolerant capability is provided. The electromagnetic characteristics of the proposed machine are analyzed by using the finite element method.