Hybrid superconducting magnetic bearing for kinetic energy storage applications and its frictional energy loss
- Univ. of Houston, TX (United States); and others
A hybrid superconducting magnetic bearing (HSMB) has been designed, constructed and implemented in a flywheel energy storage (FES) prototype. The HSMB design uses magnetic forces from permanent magnets for levitation and high temperature superconductor YBCO in between the magnets for stabilization. A 19 kg (42 lb.) flywheel currently can rotate up to 6,000 RPM with kinetic energy of 8 Wh stored. To identify the factors of frictional energy loss in the bearings, the authors have conducted a series of spin-down experiments in different operational conditions. The result from the recent test under the air pressure of 10{sup {minus}5} torr indicates an average frictional energy loss <2% per hour, with the imperfect system alignment and an unbalanced rotor.
- OSTI ID:
- 416740
- Report Number(s):
- CONF-950722-; TRN: 96:006129-0116
- Resource Relation:
- Conference: CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995; Other Information: PBD: 1996; Related Information: Is Part Of Advances in cryogenic engineering. Volume 41, Part A & B; Kittel, P. [ed.]; PB: 2037 p.
- Country of Publication:
- United States
- Language:
- English
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