标题：Optimal design of a cost-effective SPM motor to suppress torque pulsations using multi-grade permanent magnets
作者：Zhao W.; Kwon B.-I.
作者机构：[Zhao, W] School of Electrical Engineering, Shandong University, Jinan, Shandong, 250061, China, Department of Electronic Systems Engineering, Hanyang 更多
来源：IEEE CEFC 2016 - 17th Biennial Conference on Electromagnetic Field Computation
关键词：Finite element method; Genetic algorithm; Magnet cost; SPM motor; Torque pulsations
摘要：This paper presents an optimal design for a surface-mounted permanent magnet motor (SPMM) to save magnet cost and suppress torque pulsations, by using multi-grade permanent magnets. Based on a conventional SPMM with NdFeB magnets, the proposed SPMM is designed with multi-grade ferrite and NdFeB magnets, and then optimized by combing the Kriging method with a genetic algorithm, for further minimizing torque pulsations and saving the magnet cost. As a result, the cogging torque, torque ripple, and magnet cost of the optimized SPMM are highly reduced compared to the conventional SPMM. The optimized SPMM is finally verified to have good endurance against the irreversible demagnetization within three times of the rated current excitation, with the aid of a finite element method. © 2016 IEEE.