Modeling and Analysis of Permanent Magnet Machines with Salient Shape Unequal Thickness Magnets
Ni Youyuan1, Wang Lei1, Wang Qunjing2
1. School of Electrical Engineering & Automation Hefei University of Technology Hefei 230009 China;; 2. College of Electrical Engineering & Automation Anhui University Hefei 230601 China;
Abstract：The shape of magnets directly influences the electromagnetic performance of permanent magnet (PM) machines significantly. Two kinds of novel PM machines with salient shape unequal thickness magnets were presented. Two salient shape unequal thickness magnets were modeled. The air-gap magnetic field in the machines was analytically obtained by a subdomain model method with solving the Laplacian and quasi-Poissonian equations in each subdomain and applying the boundary conditions. Besides, the back electromotive force (EMF), electromagnetic torque and cogging torque were analytically obtained. Compared with the conventional structure with equal thickness magnets, the machines with salient shape unequal thickness magnets can improve the electromagnetic performance with the equal magnet usage. In addition, the influences of the parameters of salient shapes on the electromagnetic performance were also investigated. Finally, the correctness of the analytical models was verified by a finite element method (FEM).
倪有源, 王磊, 王群京. 凸形不等厚磁极永磁电机建模与分析[J]. 电工技术学报, 2020, 35(11): 2406-2414.
Ni Youyuan, Wang Lei, Wang Qunjing. Modeling and Analysis of Permanent Magnet Machines with Salient Shape Unequal Thickness Magnets. Transactions of China Electrotechnical Society, 2020, 35(11): 2406-2414.
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2020, Vol. 35 
