Abstract
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, we have conducted a series of spin-down experiments in different operational conditions. The result from the recent test under the air pressure of 10 -5 torr indicates an average frictional energy loss <2% per hour, with the imperfect system alignment and an unbalanced rotor.
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© 1996 Plenum Press, New York
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Xia, Z., Ma, K., Chen, Q., Cooley, R., Fowler, P., Chu, WK. (1996). Hybrid Superconducting Magnetic Bearing for Kinetic Energy Storage Applications and its Frictional Energy Loss. In: Kittel, P. (eds) Advances in Cryogenic Engineering. A Cryogenic Engineering Conference Publication, vol 41. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0373-2_126
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DOI: https://doi.org/10.1007/978-1-4613-0373-2_126
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