Reduction of levitation decay in high Tc superconducting magnetic bearings

Yun Luo, Toshiyuki Takagi, Kenzo Miya

Research output: Contribution to journalConference articlepeer-review

30 Citations (Scopus)


Relaxations of levitation properties in high Tc superconducting (HTSC) magnetic bearings are known to reveal different behaviors on the ascending and descending branches of their force-displacement curves, i.e. the relaxations on the ascending branch seem to be reduced more than those on the descending one. In this paper, the effect has been theoretically illustrated in a superconducting half-space based on the Bean model and interpreted by the hysteretic behaviors of shielding current. Numerical simulations on the relaxation of levitation forces have been carried out, taking the hysteresis effect of shielding current into account. The relaxations of levitated heights (displacements) have also been evaluated numerically and simulated results were compared with measured data. The effect improves the levitation characteristics both in calculations and experiments. Furthermore, the practical applications of the above mentioned effect (referred to a Hysteresis Hardening Effect) are also discussed.

Original languageEnglish
Pages (from-to)331-338
Number of pages8
Issue number4
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1997 Space Cryogenics Workshop - Eugene, OR, USA
Duration: 1997 Aug 41997 Aug 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)


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