Novel Single-Phase Doubly Salient Permanent Magnet Machine With Asymmetric Stator Poles

Abstract

One novel 4/6 stator/rotor single-phase doubly salient permanent magnet machine with asymmetric stator poles is proposed in this paper. The stator poles of proposed machine are distributed non-uniformly along the circumference of the stator yoke. First, it investigates the new topology and working principle in detail. Then, the presented structure is optimized based on 2-D finite element analysis. Finally, full comparison of electromagnetic performance indexes of the new machine with those of the traditional one is also presented. It indicates that the novel structure has a much higher torque density, lower cost of permanent magnet, and a much better starting capability than those of the traditional one under the constant volume and electrical load.