Technology trends, challenges, and opportunities of reduced-rare-earth PM motor for modern electric vehicles

Nowadays, with increasing concerns about environmental pollution and energy crisis electric vehicles are rapidly developing owing to their significant environmental-friendly benefits. To meet the diverse driving requirements of electric vehicles, the PM motors with high-performance rare-earth PMs have been widely employed in electric vehicle powertrains, which shows the performance merits of high power density and high efficiency. Yet, rare-earth PMs, as non-renewable strategic resources, usually suffer from unstable supply and fluctuation prices, which increases the potential risks of further large-scale application of rare-earth PM motors. And this also poses a negative factor for the long-term sustainable development of electric vehicles or other applications that rely heavily on rare-earth PM materials. Under this background, a type of less-rare-earth PM motors, which aims to effectively alleviate the dependence of high-performance PM motors on rare-earth PMs, has recently drawn increasing attention from experts and scholars. It implies that the investigation and development of less-rare-earth PM motors without compromising performances is becoming a new and hot research direction in the motor field. This paper reviews the existing main alternatives for less-rare-earth PM motors. Based on the dominated torque component, the less-rare-earth PM motors are divided into two types, which are the less-rare-earth PM-dominated motor and less-rare-earth PM-assisted motor. The operation principle, design considerations and restrictions of each type of less-rare-earth PM motor is sequentially discussed. Finally, combined with the potential electric vehicle application, the key problems of less-rare-earth PM motor are summarized and the corresponding technological means are prospected.

• Record URL:
  • https://doi.org/10.1016/j.geits.2022.100012
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S2773153722000123
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/27731537
• Supplemental Notes:
  • © 2022 Published by Elsevier Ltd on behalf of Beijing Institute of Technology Press Co., Ltd. Abstract reprinted with permission of Elsevier.
• Authors:
  • Zheng, Shiyue
  • Zhu, Xiaoyong
  • Xiang, Zixuan
  • Xu, Lei
  • Zhang, Li
  • Lee, Christopher H T
• Publication Date: 2022-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 100012
• Serial:
  • Green Energy and Intelligent Transportation
  • Volume: 1
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 2773-1537
  • Serial URL: https://www.sciencedirect.com/journal/green-energy-and-intelligent-transportation
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Electric vehicles; Metals; Motors; Permanent magnets; Power trains; Sustainable transportation
• Subject Areas: Energy; Highways; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 01936328
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 8 2024 3:49PM