Novel dual-airgap axial field fault-tolerant flux switching permanent magnet machines with high torque performance

Therefore, in this paper, a novel axial field FSPMM is proposed for obtaining good fault-tolerant capability and high torque performance with not only high torque density but also low cogging torque and torque ripple. The proposed FSPMM is equipped with two unaligned rotors with one tooth width offset, and two sets of phase-group concentrated-coil windings, for obtaining improved fault-tolerant capability and dramatic flux magnification. In order to highlight the contribution of the proposed FSPMM, two conventional FSPMMs are adopted as the reference models and the performance comparison is performed based on 3-D finite element method (FEM).