Comparison of Flux-Switching Machines With and Without Permanent Magnets

Chinese Journal of Electrical Engineering ›› 2015, Vol. 1 ›› Issue (1): 78-84.

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Comparison of Flux-Switching Machines With and Without Permanent Magnets

Christopher H. T. Lee, K. T. Chau*, C. C. Chan

Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China

Online:2015-12-25 Published:2015-12-25
About author:Christopher H. T. Lee received the B.Eng. (First Class Hons.) degree in electrical engineering from Department of Electrical and Electronic Engineering, University of Hong Kong, Hong Kong, in 2009. He has been working toward the Ph.D. degree since 2011. During the Ph.D. study, he was co-supervised by Prof. K. T. Chau and Prof. C. C. Chan. His research interests include electric machines and drives, renewable energies, and electric vehicle technologies. In these areas, he has published about 30 technical papers. (http://www.eee.hku.hk/~htlee/)
K. T. Chau received the B.Sc.(Eng.) with 1st Class Hons, M.Phil., and Ph.D. degrees in electrical and electronic engineering from The University of Hong Kong, Hong Kong, in 1988, 1991, and 1993, respectively. Since 1995, he has been with The University of Hong Kong, where he is currently a Professor in the Department of Electrical and Electronic Engineering. He has published 6 books, 8 book chapters and over 250 refereed journal papers. His research interests include electric and hybrid vehicles, machines and drives, and renewable energy systems. Professor Chau is Fellow of the IEEE, IET and HKIE. He currently serves as Co-editor of the Journal of Asian Electric Vehicles. He was the recipient of the Changjiang Chair Professorship from the Ministry of Education, China, the Environmental Excellence in Transportation Award for Education, Training, and Public Awareness from the SAE International, and the Award for Innovative Excellence in Teaching, Learning and Technology at the International Conference on College Teaching and Learning. (http://www.eee.hku.hk/people/ktchau/)
Prof. C. C. Chan holds BSc, MSc, PhD, HonDSc, HonDTech degrees. Honorary Professor and Former Head of the Department of Electrical and Electronic Engineering at the University of Hong Kong; Visiting Professor of MIT, University of Cambridge, etc; Founding President of the World Electric Vehicle Association; Senior Consultant to governments, Strategic Adviser or Independent Director of public companies and industries; Fellow of the Royal Academy of Engineering, U.K., Chinese Academy of Engineering, IEEE, IET and HKIE. Recipient of the Royal Academy of Engineering Prince Philip Medal; World Federation of Engineering (WFEO) Medal of Engineering Excellence; Gold Medal of Hong Kong Institution of Engineers; IEE International Lecture Medal; “Asia’s Best Technology Pioneers” by Asiaweek; “Father of Asian Electric Vehicles” by Magazine Global View; “Pitamaha (Grandfather) of Electric Vehicle Technology” in India; “Environmental Excellence in Transportation Award” by Society of Automotive Engineers (SAE); published 11 books, over 300 technical papers and holds 9 patents. (http://www.eee.hku.hk/people/ccchan.html)
Supported by:
ktchau@eee.hku.hk

Abstract

Abstract: In this paper, three advanced flux-switching (FS) machines, namely the radial-field flux-switching permanent-magnet (RF-FSPM) machine, the radial-field flux-switching DC-field (RF-FSDC) machine, and the axial-field FSDC (AF-FSDC) machine are quantitatively compared. Upon the installation of the high-energy-density PM materials, the RF-FSPM machine can definitely provide the superior torque performances as compared to its magnetless counterparts. However, the PM machines suffer from two major fundamental problems, namely the high material costs, and the uncontrollable flux density. By utilizing the concept of axial-field structure, the AF-FSDC machine can offer comparable torque performance as the RF-FSPM machine. Hence, with the consideration of the cost-effectiveness and the control flexibility, the magnetless AF-FSDC machine has exhibited promising potential in various applications.

Key words: Flux-switching, magnetless, radial-field, axial-field, cost-effectiveness.

Christopher H. T. Lee, K. T. Chau*, C. C. Chan. Comparison of Flux-Switching Machines With and Without Permanent Magnets[J]. Chinese Journal of Electrical Engineering, 2015, 1(1): 78-84.

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Comparison of Flux-Switching Machines With and Without Permanent Magnets

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