A Novel Stator and Rotor Dual Permanent Magnet Vernier Motor with Space Vector Pulse Width Modulation

摘要

In this paper, electric machines with dual permanent magnet (PM) structures on the stator and rotor are studied and evaluated as one special case of flux modulating machines. The low-speed high-torque feature of the machine is mainly attributed to its gear effect, which is explained in the full paper. The main feature of this proposed machine is that PMs are buried both in stator and rotor ingeniously so as to produce a large torque at very low speed. This machine is compared with Vernier machines with a single side PM structure. The torque improvement with the proposed design is verified numerically. The motor is controlled by using vector control method with space vector pulse width modulation (SVPWM). Time-stepping finite-element-method (TS-FEM) is used to analyze the transient performance of the machine and its controller.