Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconducting wire – tape – cable – or fiber – per se
Patent
1994-10-19
1999-08-03
Sough, Hyung-Sub
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconducting wire, tape, cable, or fiber, per se
505230, 505232, 1741251, H01B 1212, H01L 3914
Patent
active
059325232
ABSTRACT:
In order to provide a flexible oxide superconducting cable conductor which is reduced in ac loss, tape-shaped multifilamentary superconducting wires covered with a stabilizing metal are spirally wound on a flexible former. Each of the multifilamentary superconducting wires has a plurality of filaments. The filament contains an oxide superconductor. The superconducting wires are preferably wound on the former at a bending strain of not more than 0.3 %. In winding on the former, a prescribed number of tape-shaped multifilamentary superconducting wires are wound on a core member in a side-by-side manner, to form a first layer. Then, an insulating layer is provided on the first layer. This insulating layer can be formed by an insulating tape. A prescribed number of tape-shaped superconducting multifilamentary wires are wound on the insulating layer in a side-by-side manner, to form a second layer. The insulating layer is adapted to reduce ac loss of the conductors. When the former is made of a metal, it is more preferable to provide an insulating layer between the former and the multifilamentary superconducting wires.
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E.B. Forsyth, "Energy Loss Mechanisms of Superconductors Used in Alternating-Current Power Transmission Systems", Science, vol. 242, Oct. 21, 1988, pp. 391-399.
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Fujikami Jun
Hara Tsukushi
Ishii Hideo
Sato Ken'ichi
Shibuta Nobuhiro
Sough Hyung-Sub
Sumitomo Electric Industries Ltd.
The Tokyo Electric Power Company Incorporated
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