Performance Comparison of Surface and Spoke-Type Flux-Modulation Machines With Different Pole Ratios

Zou, Tianjie; Li, Dawei; Qu, Ronghai; Jiang, Dong

Abstract

In this paper, performance comparison between surface and spoke-type flux modulation (FM) permanent magnet (PM) machines is presented. Generally, spoke-array magnet arrangement is capable of increasing the torque density of PM machines due to its flux-focusing effect. Nevertheless, a flux-barrier effect is found when this magnet topology is applied in FM machines, which may offset the advantage in torque capability when the pole ratio is high. By flux distribution comparison of these two-machine topologies, the flux-barrier effect is visually explained. Through numerical FEA, this effect is further investigated in spoke-type vernier PM machines with a series of pole ratios. Finally, compared with surface-type FM machines, considerable reduction in modulated magnetic field as well as output torque capability is verified in high pole ratio, spoke-type FM machines.

Citation

Zou, T., Li, D., Qu, R., & Jiang, D. (2017). Performance Comparison of Surface and Spoke-Type Flux-Modulation Machines With Different Pole Ratios. IEEE Transactions on Magnetics, 53(6), 1-5. https://doi.org/10.1109/tmag.2017.2662081

• Journal Article Type: Article
• Acceptance Date: Jan 27, 2017
• Online Publication Date: Jan 31, 2017
• Publication Date: 2017-06
• Deposit Date: Feb 23, 2022
• Publicly Available Date: Mar 4, 2022
• Journal: IEEE Transactions on Magnetics
• Print ISSN: 0018-9464
• Electronic ISSN: 1941-0069
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 53
• Issue: 6
• Pages: 1-5
• DOI: https://doi.org/10.1109/tmag.2017.2662081
• Keywords: Electrical and Electronic Engineering; Electronic, Optical and Magnetic Materials
• Public URL: https://nottingham-repository.worktribe.com/output/7505497
• Publisher URL: https://ieeexplore.ieee.org/document/7837617
• Additional Information: © 2017 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.