Novel Slot-Opening-PM Vernier Reluctance Machine With High-Order-Harmonic Winding

Abstract

To combine the advantages of permanent magnet motor and electric excitation, a hybrid excitation Vernier reluctance motor is proposed in this paper. To make improved usage of working harmonics and relieve saturation effect in the stator core, a short-pitch distributed winding connection utilizing working harmonics modulated from fifth-order harmonics of DC excitation is newly applied to this machine, and tangentially-magnetized PMs are also introduced in this paper. The finite element analysis (FEA) simulation results verify that the proposed winding arrangement can achieve 26% higher output torque density compared to the conventional concentrated winding distribution and the slot PM can effectively alleviates the magnetic circuit saturation in the stator core.