Switched Reluctance Motor Supersedes Rare Earth-Contained Motors

Keywords
Rare earth, switched reluctance motor, synchronous motor, SRM, reluctance differences, interior permanent magnet synchronous motors, IPMSM, permanent magnet rotor, EV, HEV, FCV, China, Japan, collision accident, fishing boat, patrol boat, export, import

Summary
SRM was improved to have the performances comparable with those of the incumbent IPMSM. Some characteristics of the improved SRM exceeded those of the IPMSM. Creative efforts were focused on the motor structure and selection of the materials to be used, and the best combinations of them were found.
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The rare earth issue has been closed up recently in Japan.

Over 90% of the rare earths currently used in Japan is imported from China. Recently, the collision accident between the Chinese fishing boat and the Japanese patrol boat occurred. As the result of the
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[Copyright by FuelCell japan]

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