Variable Magnetization Machine in Electrified Vehicle Application

Takashi Fukushige, Takashi Kato, Kan Akatsu, Robert D. Lorenz

研究成果: Article査読

1 被引用数 (Scopus)


This paper describes variable magnetization machines, which are capable of varying the magnetization state (MS) of permanent magnets during operation. A pulse current on the stator windings creates a magnetic field on the rotor; this can be used to manipulate the MS of the rotor magnets. Regulating the MS according to the machine operating condition can reduce machine losses. A proof-of-principle machine was designed and fabricated. A series of experiments was conducted to evaluate the torque–speed envelope and efficiency contours of the fabricated machine. A full-scale machine was then designed with a modified magnetic circuit for application to an electric vehicle and evaluated using finite element analysis. A control strategy for the MS during machine operation is proposed, and the losses during a driving cycle with the strategy were evaluated.

ジャーナルElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
出版ステータスPublished - 2016 11月 1

ASJC Scopus subject areas

  • 電子工学および電気工学
  • エネルギー工学および電力技術


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