A Novel Dual-Stator Permanent Magnet Vernier Machine with Enhanced Torque Density and Power Factor

A novel dual-stator vernier permanent magnet (VPM) machine is proposed in this paper. Compared with single stator VPM machines, the proposed dual-stator VPM machines have several advantages, such as high torque density, high power factor and low magnet loss. Theoretic and finite element analysis (FEA) show these advantages, of the proposed machine, increase as the pole ratio (ratio of the rotor pole pair number to stator pole pair number) increase. To verify the rotor structure strength of the proposed dual-stator machine, structure FEA analysis is carried out in this paper, and the results reveal that the rotor structure has the sufficient strength.