Bearings consisting of permanent magnets stably levitated over high-temperature superconductors exhibit low rotational drag and

_8 56th AnnualAmericanPowerConference and have thousands of times _essfdction than the best "Generation-FuelOptions& Equipment" rollerbearings. This presentsnew storage possibilities Chicago, lL-Apd125-27, 1994 when combined with technological advances in highstrength composite materials and advanced power electronics.By incorporatingHTS bearings with high-Flywheel Energy Storage using strength composite materials for ultra high-speed-Superconducting Magnetic Bearings flywheels with new-technologymotor/generators, energy can be stored and releasedwith very low losses.

No abstract

Government retsina for iteelf, and others aoting on k kehalf, a paid-up, nonexclusive, irrevocable worldwide Ik8nse in said arfiife to reproduoe, prapera derivative worfra, d@ribute cepiea to the public, and perform publicly and display )Utmily, bv or err behalf of the Government. IRE!CXWVED

Abstract-Design, fabrication, and performance, of a 1/3-m dia., 10-kg flywheel rotor with only one bearing is discussed.To achieve low-loss energy storage, the rotor's segmented-ring permanentmagnet (PM) is optimized for levitation and circumferential homogeneity.The magnet's carbon composite bands enable practical energy storage.