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Flywheel energy storage using superconducting magnetic bearings

✍ Scribed by John R. Hull; Thomas M. Mulcahp; Kenneth L. Uherka; Robert A. Erck; Robert G. Abboud

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
915 KB
Volume
2
Category
Article
ISSN
0964-1807

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✦ Synopsis

The ability of high-temperature superconducting (HTS) bearings to exhibit low rotatlonal loss makes possible high-efficiency flywheel energy storage (FES). In this paper, we discuss the general benefit of high-efficiency FES and a possible route to develop the HTS bearings required to achieve it. We describe a method to characterize superconducting bearings in terms of an effective coefficient of friction and present an expression for the coefficient that is general for most geometries. We also report a coefficient of friction of 3 x IO-' for an 0.32 kg rotor. Initial experiments with a 12 kg rotor are also described.

πŸ“œ SIMILAR VOLUMES

A superconducting high-speed flywheel en
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A prototype of a flywheel system with auto stable high temperature superconducting bearings was built and tested. The bearings offered good vertical and lateral stability. A metallic flywheel disk, ~ 190 mm x 30 mm, was safely rotated at speeds up to 15000 rpm. The disk was driven by a 3 phase synch