Design Optimization and Analysis of a Dual-Permanent-Magnet-Excited Machine Using Response Surface Methodology

Energies

Linni Jian¹  Yujun Shi²  Jin Wei²  Yanchong Zheng²  Zhengxing Deng² 

[1]Department of Electrical and Electronic Engineering, South University of Science and Technology of China, Shenzhen 518055, China

关键词: dual permanent magnet excited machine;    bi-directional field modulation effect;    optimum design;    torque density;    low-speed large-torque;    direct drive;    response surface methodology;    finite element method;   

DOI  :  10.3390/en80910127

来源: mdpi

【 摘 要 】

The dual-permanent-magnet-excited (DPME) machine employs permanent magnets (PMs) both on the stator and the rotor. It relies on the bi-directional field modulation effect (BFME) to achieve stable electromechanical energy conversion. Therefore, this new type of machine is capable of offering much higher torque capability than its traditional counterparts. This paper is devoted to investigating the optimum design method for improving the BFME of DPME machines, so as to further improve their produced electromagnetic torques. Response surface methodology is engaged to investigate the impacts of shape factors of the stator and rotor slots on the torque capability of the DPME machine, and the fitted models are built up by using both the finite element method (FEM) and the least-squares method. After that, the optimum shape factors are obtained from the fitted models. The results estimated by using both two-dimensional (2D)-FEM and three-dimensional (3D)-FEM demonstrate that the pull-out torque of the optimum case is 24.5% larger than that of the initial case, while the usage of PM material of the optimum case is 8.9% less than that of the initial case.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.