volume | PIER Journals

Abstract

This paper addresses the problem of sizeable cogging torque and torque ripple of conventional consequent pole permanent magnet motor (CPPM) and proposes an asymmetric pole-consequent pole permanent magnet (AP-CPPM) motor as a solution. This paper proposes an asymmetric pole-consequent pole permanent magnet (AP-CPPM) motor. A combined strategy of response surface method and multi-objective genetic algorithm is adopted. Firstly, sensitivity analysis of design variables and stratification were carried out, and subsequently, the mathematical model between the design variables and the optimization objective is obtained by Response Surface Methodology (RSM). Then, the high-sensitivity parameters are optimized using a Multi-Objective Genetic Algorithm (MOGA) to get the optimal solution. Finally, the electromagnetic performances of the motor before and after optimization are compared using Finite Element Analysis (FEA) software. The results indicated that the optimized motor reduced the torque ripple by 39.9% and the peak-to-peak value of cogging torque by 62.41% with only a 3.1% reduction in the output torque, which ensured good output characteristics and verified the feasibility of the optimization scheme.

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Dr. Jianwei Liang

Mr. Xinyu Zeng

Dr. Yuqian Zhao

Ms. Tian Song

Dr. Xiubin Zhu

Dr. Zhangsheng Liu