A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles

Hui Yang (), Peng Wu, Dabin Liu, Yuehan Zhu, Shuhua Fang and Heyun Lin
Additional contact information
Hui Yang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Peng Wu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Dabin Liu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Yuehan Zhu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Shuhua Fang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Heyun Lin: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2025, vol. 18, issue 12, 1-16

Abstract: This paper proposes a novel hybrid less-rare-earth permanent magnet (HLEPM) machine, which is designed to meet the demands of electric vehicle (EV) traction machines for high torque output and wide-speed-range high-efficiency performance. The designed machine features a unique hybrid permanent magnet arrangement, consisting of V-shaped rare-earth PMs and arc-shaped less-rare-earth PMs, respectively. The V-shaped rare-earth magnets can perform the flux-focusing effect well, not only enhancing the torque output capability but also improving the demagnetization with the standability of the arc-shaped less-rare-earth PMs during active short-circuit (ASC) conditions. First, the proposed machine is thoroughly designed and optimized to balance the torque capability and iron loss. Subsequently, the electromagnetic performance of the proposed HLEPM machine is evaluated using finite-element (FE) analysis and compared with that of a conventional double-layer V-shaped PMSM. Finally, the anti-demagnetization characteristics of the two machines under ASC conditions are analyzed in detail. The results validate the rationality and reliability of the proposed design.

Keywords: demagnetization; electric vehicles; high efficiency; PM machine; rare earth (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/12/3051/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/12/3051/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:12:p:3051-:d:1675077

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().