Design and characteristics of a superconductor bearing

Cited 26 time in webofscience Cited 0 time in scopus
  • Hit : 877
  • Download : 1003
A high-temperature superconductor (HTS) journal bearing was designed for a flywheel energy storage system. A rotor was supported at top and bottom by two HTS bearings. The rotor weight is 4 kg and the length and diameter of shaft were about 300 rum and 40 mm, respectively. Both the top and bottom bearings have two permanent magnet (PM) rings with an iron pole piece separating them. Static properties of the bearing were calculated by frozen image method and verified by experiments. The vertical stiffness of the bearing was 38.9 N/mm. The rotational drag and vibration were measured up to 8000 rpm. The loss coefficient was linear up to 8000 rpm and the final value was 7.5 x E - 6. The average of vibration was about 10 micrometer (zero-peak) except the resonance speed range. Rotation tests were conducted over the same speed range at several chamber pressures. Chamber pressure of 0.4 mtorr is sufficiently low to minimize windage loss.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2005-06
Language
English
Article Type
Article; Proceedings Paper
Keywords

ENERGY-STORAGE SYSTEM

Citation

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.15, pp.2249 - 2252

ISSN
1051-8223
URI
http://hdl.handle.net/10203/1477
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 26 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0