volume | PIER Journals

Abstract

In view of the problems of excessive magnetic flux leakage of the traditional permanent magnet fault-tolerant vernier rim-driven motor, low utilization rate of permanent magnets and high price of permanent magnet materials, this paper proposes a flux-concentrating consequent-pole permanent magnet fault-tolerant vernier rim-driven motor structure. Firstly, combined with the magnetic field modulation theory, the no-load air gap magnetic density of the motor is analyzed, and the working principle of the multi-harmonic operation of the motor is explained according to the harmonic analysis. Secondly, parametric modeling is used to screen the critical structural parameters that can significantly affect electromagnetic performance of the motor, and the response surface method and sensitivity analysis are used to rank the sensitivity of the critical parameters. Then, the high-sensitivity parameters are first subjected to multi-objective optimization, and then adjusted according to the low-sensitivity parameters. Finally, the air gap magnetic density, back- EMF, cogging torque and permanent magnet numbers of the motor before and after optimization are compared and analyzed by finite element analysis. The results show that the flux-concentrating consequent-pole permanent magnet vernier rim-driven motor has higher torque density, less torque ripple and higher utilization of permanent magnets.

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Dr. Wangsong He

Professor Jingwei Zhu

Dr. Zhe Wang

Mr. Jiubo Yue

Dr. Tianrui Zhao