Machine element or mechanism – Elements – Flywheel – motion smoothing-type
Patent
1991-07-26
1993-06-01
Braun, Leslie A.
Machine element or mechanism
Elements
Flywheel, motion smoothing-type
74572, 501 1, F16C 3906, F16F 1500, H01L 3912
Patent
active
052149811
ABSTRACT:
A flywheel having superconductor bearings has a lower drag to lift ratio that translates to an improvement of a factor of ten in the rotational decay rate. The lower drag results from the lower dissipation of melt-processed YBCO, improved uniformity of the permanent magnet portion of the bearings, operation in a different range of vacuum pressure from that taught by the art, and greater separation distance from the rotating members of conductive materials.
REFERENCES:
patent: 4132130 (1979-01-01), Schneider
patent: 4870310 (1989-09-01), Triplett
patent: 4886778 (1989-12-01), Moon et al.
patent: 4939120 (1990-07-01), Moon et al.
patent: 4961352 (1990-10-01), Downer et al.
"Magnetic Forces in High-T.sub.c Superconducting Bearings", F. C. Moon, published in Applied Electromagnetics in Materials, vol. 1 (1990), pp.29-35.
"High-speed Rotation of Magnets on High T.sub.c Superconducting Bearings", F. C. Moon et al. published in Appl. Phys. Lett., vol. 56 (4), Jan. 22, 1990, pp. 397-399.
"Satellite Power Using a Magnetically Suspended Flywheel Stack", J. A. Kirk et al. published in J. of Power Sources, vol. 22 (1988), pp. 301-311.
"Rotor Dynamics of Flywheel Energy Storage Systems", C. P. Jayaraman et al, published in Journal of Solar Energy Engineering, vol. 113, Feb. 1991, pp. 11-18.
"A new Process with the Promise of High J.sub.c in Oxide Superconductors", J. Murakami et al, published in Japanese Journal of Applied Physics, vol. 28, No. 7, Jul. 1989, pp. 1189-1194.
"Levitation Forces, Relaxation and Magnetic Stiffness of Melt-Quenched YBa.sub.2 Cu.sub.3 O.sub.x ", F. C. Moon, et al, published in Japanese Journal of Applied Physics, vol. 29, No. 7, Jul. 1990, pp. 1257-1258.
Hull John R.
Lynds, Jr. Lahmer
Weinberger Bernard R.
ARCH Development Corporation
Braun Leslie A.
Pitts Andrea
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