Design and Comparison of Surface Inset Permanent Magnet Machine and Surface Permanent Magnet Machine without Heavy Rare Earth Magnets for Traction Applications

Conference · Sun Oct 29 04:00:00 EDT 2023 · 2023 IEEE Energy Conversion Congress and Exposition (ECCE)

DOI:https://doi.org/10.1109/ecce53617.2023.10362289· OSTI ID:2535651

Feng, Wenda ^[1]; Chen, Ken ^[1]; Paddock, Justin ^[1]; Jahns, Thomas ^[1]; Sarlioglu, Bulent ^[1]

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1. University of Wisconsin-Madison,Department of Electrical and Computer Engineering,Madison,USA

This paper presents two machine designs: a surface inset permanent magnet (SIPM) machine and a surface permanent magnet (SPM) machine, both without heavy rare-earth magnets, that achieve 50 kW/L active power density and a constant-power speed ratio of 3 for EV traction applications. Compared to surface PM machines, SIPM machines do not require a special containment sleeve to hold the magnets in place at high speeds, provided that the rotor laminations are carefully designed together with the magnet mounting configuration to ensure the rotor’s structural integrity. Comparisons between the SPM and SIPM machines sharing the same stator, same current level, and same power speed envelope are presented. Both deliver very similar performance characteristics, but the SIPM machine’s simpler magnet containment configuration may give it an advantage in terms of reduced material and manufacturing costs.

• Research Organization: University of Wisconsin System
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
• DOE Contract Number: EE0008704
• OSTI ID: 2535651
• Conference Information: Journal Name: 2023 IEEE Energy Conversion Congress and Exposition (ECCE)
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
heavy rare earth material
surface inset permanent magnet machine
surface permanent magnet machine
traction drive application