Variable magnetization machine in electrified vehicle application

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper describes variable magnetization machines, which are capable of varying the magnetization state 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 magnetization state of the rotor magnets. Regulating the magnetization state 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 magnetization state during machine operation is proposed, and the losses during a driving cycle with the strategy were evaluated.

Original languageEnglish
Pages (from-to)922-928
Number of pages7
JournalIEEJ Transactions on Industry Applications
Volume135
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

Fingerprint

Magnetization
Rotors (windings)
Magnetic circuits
Electric vehicles
Stators
Permanent magnets
Magnets
Torque
Rotors
Magnetic fields
Finite element method
Experiments

Keywords

  • Efficiency
  • Flux intensifying machine
  • Memory motor
  • Permanent magnet synchronous machine
  • Variable flux machine
  • VFI-IPM

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering

Cite this

Variable magnetization machine in electrified vehicle application. / Fukushige, Takashi; Kato, Takashi; Akatsu, Kan; Lorenz, Robert D.

In: IEEJ Transactions on Industry Applications, Vol. 135, No. 9, 01.09.2015, p. 922-928.

Research output: Contribution to journalArticle

Fukushige, Takashi ; Kato, Takashi ; Akatsu, Kan ; Lorenz, Robert D. / Variable magnetization machine in electrified vehicle application. In: IEEJ Transactions on Industry Applications. 2015 ; Vol. 135, No. 9. pp. 922-928.
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