Magnetic field analysis for axial flux permanent magnet motor with novel Halbach array

被引：0
|
作者：
Wang X. [1 ]
Yin C. [1 ]
Li T. [1 ]
机构：
[1] School of Electrical and Information Engineering, Tianjin University, Tianjin
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2024年 / 28卷 / 02期
关键词：
air gap flux density; analytic method; axial flux permanent magnet motor; Halbach array; motor design; print circuit board stator;
D O I：
10.15938/j.emc.2024.02.003
中图分类号：
学科分类号：
摘要：
A type of Halbach array of T-shaped permanent magnets, which was applied in the coreless axial flux permanent magnet motor (AFPMM) with printed circuit board (PCB) stator, was proposed. The Halbach array of T-shaped permanent magnets have the advantages of simple structure and easy implementation. The vector magnetic potential method was used to analyze and derive the no-load air gap magnetic density which was generated by the Halbach array of T-shaped permanent magnets, and obtaining a mathematical model about the air gap magnetic field. Based on the model, while keeping the total amount of permanent magnets constant, the pole-arc coefficient ratio and radial length ratio of the permanent magnets were taken as the optimization variables, and the amplitude and harmonic distortion rate of the air gap flux density were taken as optimization objectives. The optimal parameters of the Halbach array of T-shaped permanent magnets were designed. The three-dimension finite element models showed that the air gap flux density waveforms obtained by analytical method and finite element method are in good agreement, verifying the rationality of the analytical model. In addition, compared with the Halbach array of tradition permanent magnets, the harmonic distortion rate of the air gap flux density generated by the Halbach array of T-shaped permanent magnets can be reduced from 19. 8% to 4. 8%, while the amplitude of the fundamental wave generated by the novel Halbach array can be increased by 10. 3% . The optimization effect of the novel Halbach array is obvious, which can effectively reduce the eddy current loss under high frequency conditions and improve the efficiency of the motor. Finally, a prototype was produced and relevant experimental tests were carried out for verification, and the analytical model was proved to be valid, which has a certain reference value for the design of AFPMM with PCB stator. © 2024 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：21 / 31
页数：10
相关论文
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