Linear motion and rotation characteristics of YBCO bulk using exciting coils

S. Okamura, A. Shimizu, S. B. Kim, S. Murase

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)


A superconducting actuator with multiple motions is proposed and experimentally investigated for the development of microelectrical machines. The disk-shaped YBCO bulk was located above the electromagnets and cooled down in the field-cooling method, which enabled the flux pinning. The YBCO bulk superconductor was driven in vertical, horizontal and/or self-rotation by PC-controlled coil currents using multiple electromagnets. The most suitable levitation stability was obtained when we used four electromagnets and NNSS trapped field type. It was confirmed that the levitation force and horizontal moving force strongly depended on the coil current and the air gap length, respectively.

Original languageEnglish
Pages (from-to)834-838
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue numberI
Publication statusPublished - Oct 1 2005
EventProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
Duration: Nov 23 2004Nov 25 2004


  • Actuator
  • Motor
  • Superconducting bulk
  • Y-based cuprates

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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