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Review

Flux-Adjustable Permanent Magnet Machines in Traction Applications

by
Zicheng Zhou
1,2,
Hao Hua
1,2,* and
Ziqiang Zhu
3
1
Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai 200240, China
3
Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, UK
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2022, 13(4), 60; https://doi.org/10.3390/wevj13040060
Submission received: 4 March 2022 / Revised: 24 March 2022 / Accepted: 25 March 2022 / Published: 29 March 2022
(This article belongs to the Special Issue Advanced Permanent Magnet Machines and Drive Systems for Electric Vehicles)
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Abstract

This paper overviews the recent advances in flux-adjustable permanent magnet (PM) machines for traction applications. The flux-adjustable PM machines benefit from the synergies of the high torque density and high efficiency in conventional PM machines as well as the controllable air-gap field in wound-field machines, which are attractive for the traction applications requiring enhanced capabilities of speed regulation and uncontrolled voltage mitigation. In general, three solutions have been presented, namely the hybrid excited (HE), the mechanically regulated (MR), and the variable flux memory (VFM) machines. Numerous innovations were proposed on these topics during the last two decades, while each machine topology has its own merits and demerits. The purpose of this paper is to review the development history and trend of the flux-adjustable PM machines, with particular reference to their topologies, working mechanism, and electromagnetic performance.
Keywords: flux weakening; hybrid excited; mechanically regulated; torque; traction machine; variable flux memory flux weakening; hybrid excited; mechanically regulated; torque; traction machine; variable flux memory

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MDPI and ACS Style

Zhou, Z.; Hua, H.; Zhu, Z. Flux-Adjustable Permanent Magnet Machines in Traction Applications. World Electr. Veh. J. 2022, 13, 60. https://doi.org/10.3390/wevj13040060

AMA Style

Zhou Z, Hua H, Zhu Z. Flux-Adjustable Permanent Magnet Machines in Traction Applications. World Electric Vehicle Journal. 2022; 13(4):60. https://doi.org/10.3390/wevj13040060

Chicago/Turabian Style

Zhou, Zicheng, Hao Hua, and Ziqiang Zhu. 2022. "Flux-Adjustable Permanent Magnet Machines in Traction Applications" World Electric Vehicle Journal 13, no. 4: 60. https://doi.org/10.3390/wevj13040060

APA Style

Zhou, Z., Hua, H., & Zhu, Z. (2022). Flux-Adjustable Permanent Magnet Machines in Traction Applications. World Electric Vehicle Journal, 13(4), 60. https://doi.org/10.3390/wevj13040060

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