Comparative study on two modular spoke-type PM machines for in-wheel traction applications

Zhang, Hengliang; Hua, Wei; Gerada, David; Gerada, Chris; Li, Yugang; Zhang, Guang

Abstract

This paper focuses on the comparative analysis of modular spoke-type permanent magnet machines with two magnetization modes, which are referred to as M-I and M-II types. The analytical models of the proposed machines are built based on the simple magneto-motive-force-permeance method. With the help of finite element analysis and the analytical models, magnetic fields in machines with different magnetization modes are compared. Then, taking as a base an existing commercial in-wheel machine used in an electric motorcycle, two proposed machines with different magnetization modes are designed as in-wheel traction machines and compared with respect to electromagnetic torque, flux-weakening performance, over-load capability, etc. The machines are prototyped and experimentally tested to verify the prediction that the M-II machines exhibit a higher torque output while the M-I machines have a wider speed range.

• Journal Article Type: Article
• Acceptance Date: Jul 6, 2019
• Online Publication Date: Jul 10, 2019
• Publication Date: Jul 10, 2019
• Deposit Date: Aug 14, 2019
• Publicly Available Date: Aug 15, 2019
• Journal: IEEE Transactions on Energy Conversion
• Print ISSN: 0885-8969
• Electronic ISSN: 1558-0059
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 34
• Issue: 4
• Pages: 2137-2147
• DOI: https://doi.org/10.1109/tec.2019.2927872
• Keywords: Electrical and Electronic Engineering; Energy Engineering and Power Technology
• Public URL: https://nottingham-repository.worktribe.com/output/2428919
• Publisher URL: https://ieeexplore.ieee.org/document/8758882
• Additional Information: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.