US 7,743,485 B1Granted

Method of manufacturing a superconducting cable

AssigneeSumitomo Electric Industries, Ltd.

InventorJun Fujikami

Life of this patent

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Abstract

Provided is a superconducting cable having a structure such that cable cores, each having a superconducting layer, are housed in a thermal insulation pipe and the superconducting layer of each cable core has portions having different critical current values. When an excessive current flows in the superconducting layer in case of a short-circuit failure, the current exceeds the critical current value of the portion having a smaller critical current value first, which results in damage to the portion, suppressing the occurrence of damage to the other normal portion. A superconducting cable line using this superconducting cable and a splitter for accommodating the cable cores therein is also provided.

Claims13

Dependent claims

A method of manufacturing a superconducting cable comprising:

employing a superconducting layer in at least one cable core, the superconducting layer in the at least one cable core having a first, current limiting superconducting cable portion and a second, normal superconducting cable portion, the first portion having a critical current value different from a critical current value of the second portion, each of the first portion and the second portion having a plurality of clad wires comprising a superconductive material;
wherein making the superconducting layer comprises making the critical current value of the first portion to be smaller than that of the second portion and assembling the first portion and the second, normal portion;
and
housing the first portion inside a splitter configured to separate cable cores;
wherein the clad wires of the first portion are fewer in number than the clad wires of the second portion so that the amount of the superconductive material in the first portion is reduced compared to the second portion, and
wherein assembling the first portion and the second portion comprises coupling the clad wires of the first portion with the clad wires of the second portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/525,262Filed 22 Sep 2006 · division
Priority: JP 2003/17465719 Jun 2003
Granted: 29 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01B 12/02
Superconductive or hyperconductive conductors, cables, or transmission lines: characterised by their form
H01R 4/68
Characterised by the form or material of the contacting members: connections to or between superconductive connectors
H02G 15/34
Cable fittings: cable fittings for cryogenic cables
Y02E 40/60
Technologies for an efficient electrical power generation, transmission or distribution: superconducting electric elements or equipment; Power…

Family

Application10/781,718Parent of this division · filed 20 Feb 2004
US 7,151,225 B2Parent of this division
US 2004/0256141 A1Published application
US 7,743,485 B1This patent

From the US filing history. Foreign family members aren’t listed.

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