Rotational accuracy of superconducting magnetic bearings

Hiromasa Fukuyama, Kazutoshi Seki, Takeshi Takizawa, Shigeru Endou, Masato Murakami, Hiroshi Takaichi

Research output: Contribution to journalArticlepeer-review


Analytical and experimental study of rotational accuracy of superconducting magnetic bearings depending on the arrangements of permanent magnets is presented in this paper. With the aim of improving the rotational accuracy, the axial bearing magnet ring was divided into two rings in the radial direction and the radial bearing magnet sleeve was divided into three stacked rings in the axial direction. As a result, the magnetic flux density could be increased at the superconductor ring position, the static stiffness and the load capacity were increased, and hysteresis became large. Concerning the dynamic characteristics, the rotational accuracy of the shaft was improved remarkably and the shaft weighing 2.4 kg could rotate within 15μm peak to peak at 12 000 rpm.

Original languageEnglish
Pages (from-to)270-275
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number593
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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