Numerical analysis and evaluation of electromagnetic forces in superconducting magnetic bearings and a non-contact permanent magnetic clutch

Hiroshi Seino, Hitoshi Hasegawa, Masashi Ikeda, Ken Nagashima, Masato Murakami

Research output: Contribution to journalArticle


We are currently developing a superconducting magnetic bearing and a non-contact permanent magnetic clutch applicable to flywheel energy storage systems for railways. This paper reports on electromagnetic force analysis concerning these developments. In the analysis, the electromagnetic force generated in superconducting magnetic bearings and non-contact permanent magnetic clutches was estimated based on the magnetic field distribution ascertained through 3D numerical analysis. The validity of this analysis was then evaluated by comparing the results with experimental outcomes, and the two were found to be consistent. It was therefore confirmed that the analysis was an effective way of estimating the electromagnetic force of electromagnetic equipment containing the bulk superconductor for use in application design.

Original languageEnglish
Pages (from-to)156-161
Number of pages6
JournalQuarterly Report of RTRI (Railway Technical Research Institute) (Japan)
Issue number3
Publication statusPublished - 2010 Aug



  • Bulk superconductor
  • Energy storage system
  • Flywheel
  • Magnetic bearing
  • Superconducting magnet

ASJC Scopus subject areas

  • Mechanical Engineering

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