Design and Analysis of a Novel Dual-PM Flux Reversal Machine for Electric Vehicle Propulsion
Yuting Zheng, Yuning Yin, Min‐Gyu Kang, Youtong Fang
Abstract
Flux reversal machine with evenly distributed permanent magnet (EDFRM) is proven to have high torque density and low torque ripple. To further improve the torque density, a novel dual permanent magnet flux reversal machine (DPM-FRM) with PM on both stator and rotor is proposed and designed in this article. The machine topology and operation principles are first introduced in detail. Then, with the goal of maximum torque and with the restriction of fixed copper loss, the proposed DPM-FRM is optimized based on the finite-element (FE) method. To verify the superiority of the proposed machine, its electromagnetic performance is compared with existing EDFRM and regular surface-mounted PM machine (SPM), including flux linkage, back electromagnetic force (back EMF), cogging torque, rated torque, power factor, and overload capability. It is shown that the proposed DPM-FRM can deliver 78% and 26% higher torque compared with EDFRM and SPM. Finally, a prototype is manufactured and tested. The experimental results have verified the FE predictions.