A superconducting thrust-bearing system for an energy storage flywheel

Coombs T., Cansiz A., CAMPBELL A.

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, vol.15, no.5, pp.831-835, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 5
  • Publication Date: 2002
  • Doi Number: 10.1088/0953-2048/15/5/338
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.831-835
  • Istanbul Technical University Affiliated: No


We have constructed a bearing system for an energy storage flywheel. This bearing system uses a combination of permanent magnets and superconductors in an arrangement commonly termed as an Evershed bearing. In an Evershed system there are in fact two bearings which act in concert. In our system we have one bearing constructed entirely out of permanent magnets acting in attraction. This system bears the weight of the flywheel (43.6 kg) but would not, on its own, be stable. Stability is provided by a superconducting bearing which is formed by the interaction between the magnetic field of a permanent magnet sited on the rotor and superconductors on the stator.