A New Permanent Magnet Vernier Machine with Asymmetrical Modulated Teeth Design

This paper proposes a new permanent magnet vernier machine (PMVM) with asymmetrical stator modulated teeth design to enhance its working field harmonics and torque capability. The air-gap field modulation mechanism in proposed PMVM is theoretically analyzed by magnetomotive force-permeance model. Besides, in order to confirm themerits of the asymmetrical modulated teeth design, a traditional PMV machine with symmetrical teeth design is selected as a benchmark to perform a fair comparison. Additionally, the basic electromagnetic performances of the two PMVMs are investigated and compared by finite element method. The simulation results showthat the asymmetrical modulated teeth design exhibits an improved air-gap working harmonic amplitudes and torque capability than conventional counterpart.