Investigation of the Magnetic Circuit and Performance of Less-Rare-Earth Interior Permanent-Magnet Synchronous Machines Used for Electric Vehicles

Ping Zheng, Weinan Wang, Mingqiao Wang, Yong Liu and Zhenxing Fu
Additional contact information
Ping Zheng: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Weinan Wang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Mingqiao Wang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Yong Liu: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Zhenxing Fu: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China

Energies, 2017, vol. 10, issue 12, 1-22

Abstract: The less-rare-earth interior permanent-magnet synchronous machines (LRE-IPMSMs), which have the advantages of high power density, high efficiency, and low cost, are promising candidates for electric vehicles (EVs). In this paper, the equivalent magnetic circuit (EMC) of LRE-IPMSM is established and analyzed to investigate the machine design principles, and then the performance of an optimized machine is analyzed. Firstly, the equivalent magnetic circuits of the LRE-IPMSM are established by taking the saturation effect into consideration. Secondly, the effects of geometric parameters, such as the permanent-magnet (PM) width, the PM thickness, the flux barrier thickness, the flux barrier span angle, and the bridge width, on no-load flux, q -axis flux, and d -axis flux are investigated, respectively. The results calculated by the EMC method and finite-element analysis (FEA) are analyzed and compared, which proves the effectiveness of the EMC method. Finally, an optimized design of LRE-IPMSM obtained by the magnetic circuit analyses is proposed. The electromagnetic performances and mechanical strength of the optimized LRE-IPMSM are analyzed and verified, respectively.

Keywords: less rare earth; interior permanent-magnet synchronous machines; equivalent magnetic circuit (EMC); electromagnetic performance; mechanical strength (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: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/10/12/2173/pdf (application/pdf)
https://www.mdpi.com/1996-1073/10/12/2173/ (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:10:y:2017:i:12:p:2173-:d:123509

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 ().