Abstract
A novel asymmetric spoke-type interior permanent magnet (AS-IPM) machine is proposed in this paper. It utilizes the magnetic-field-shifting (MFS) effect to improve the torque performance, which achieves a high utilization ratio of both permanent magnet (PM) torque and reluctance torque. In addition, a general pattern of rotor topologies is proposed to represent all possible machine structures. Various rotor structures can be obtained by changing the design parameters of the general pattern. A non-dominated sorting genetic algorithm II (NSGA-II) is adopted to automatically search for optimal rotor configurations. With the aid of the optimization program, an asymmetric spoke-type rotor structure with improved performance is obtained. To showcase the advantages of the proposed machine, the electromagnetic performance is compared between a conventional spoke-type interior permanent magnet (S-IPM) machine and a proposed AS-IPM machine. The finite-element simulation results show that the optimal design of the AS-IPM performs a 7.7% higher output torque ripple due to the MFS effect while the total PM volume remains the same. Meanwhile, the torque ripple of the proposed structure is significantly reduced by 82.1%.
Funder
Research Grant Council of the Hong Kong SAR Government
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference31 articles.
1. Overview of permanent-magnet brushless drives for electric and hybrid electric vehicles;Chau;IEEE Trans. Ind. Electron.,2008
2. Investigation of torque-speed characteristics and cogging torque of fractional-slot IPM brushless AC machines having alternate slot openings;Azar;IEEE Ind. Appl.,2012
3. Overview of stator slot-opening permanent magnet machines;Niu;IEEE Trans. Transp. Electrif.,2022
4. Guan, Y., Zhu, Z.Q., Afinowi, I.A.A., Mipo, J.C., and Farah, P. (2014, January 1–4). Comparison between induction machine and interior permanent magnet machine for electric vehicle application. Proceedings of the 2014 17th International Conference on Electrical Machines and Systems (ICEMS), Hangzhou, China.
5. Performance comparison between switching-flux and IPM machines with rare-earth and ferrite PMs;Fasolo;IEEE Trans. Ind. Appl.,2014
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献