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Current terminal structure of superconducting wire material and superconducting cable having this current terminal structure

A technology of superconducting wires and current terminals, which is applied in superconducting devices, superconducting/high-conducting conductors, and the usage of superconducting elements. It can solve problems such as increased connection resistance, large AC loss, and failure to share the same current. Achieve the effect of low connection resistance and less AC loss

Active Publication Date: 2012-03-28
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, when the superconducting layer 22b of the first superconducting wire 22 arranged in the first layer faces the rear (inner side), the connection resistance of the current terminal part becomes large, and the first layer and the second layer do not share the same current.
That is, since there is not enough electrode capacity, when the current flowing through the second superconducting wire 23 in the second layer exceeds the critical current Ic, Joule heat will be generated, and the AC loss will be very large.

Method used

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  • Current terminal structure of superconducting wire material and superconducting cable having this current terminal structure
  • Current terminal structure of superconducting wire material and superconducting cable having this current terminal structure
  • Current terminal structure of superconducting wire material and superconducting cable having this current terminal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] The first superconducting wire rod of the first layer was helically wound on a mold having a diameter of 20 mm formed by kneading wires covered with insulation in multiple layers so that the substrate was on the front side (outer side). In addition, as the first and second superconducting wires, YBCO wires in which a YBCO layer was formed on a substrate made of magnetic Ni5W were used.

[0104] Then, the second superconducting wire rod of the second layer having the same structure as the first superconducting wire rod of the first layer is wound helically so that the surface of the superconducting layer becomes the front side (outer side).

[0105] Afterwards, according to image 3 In the method shown, the ends of the first and second superconducting wires are integrated using a ribbon-shaped solder composed of a connecting wire rod, a mesh tape, and solders 1 to 5 described in Table 1 to obtain figure 1 structure shown. At this time, the type of solder (hereinafter ...

Embodiment 2

[0122] Same as embodiment 1, obtain as figure 1 structure shown. At this time, the relationship between the stripped length (connection length to the soldered and fixed portion) b of the second superconducting wire and the stripped length (connected to the soldered and fixed portion) c of the connecting wire B is changed in various ways. 7 samples were obtained. In addition, one sample was obtained for bc+10 (mm), and b>c+100 (mm). In addition, except for the relationship between b and c at this time, the same conditions as in samples 1-1 to 1-3 of Example 1 were used.

[0123] With regard to these samples, electricity was applied in liquid nitrogen, and the ratios of shunt flow to the first superconducting wire and the second superconducting wire were measured, and the results shown in Table 3 below were obtained.

[0124] table 3

[0125] table 3

[0126] a=50mm

Shunting to the first-layer superconducting wire

Shunting to the second-layer superconduc...

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Abstract

A superconductor has one or more layers of a superconducting wire material including a superconducting layer formed on a substrate and wound around a former. In the superconductor, the first layer superconducting wire material wound immediately above the former is arranged so that the substrate side becomes outside and the superconducting layer side becomes inside. In a current terminal structure of the superconductor, a surface of the superconducting layer at an end of the first layer superconducting wire material, the surface being directed toward the inside, and part of a surface of the superconducting layer of a connection superconducting wire material, the surface being directed toward the outside, are faced and connected to each other.

Description

technical field [0001] The present invention relates to a current terminal structure of a superconducting wire and a superconducting cable provided with the current terminal structure. Background technique [0002] In general, a superconductor has a structure in which a multilayer tape-shaped superconducting wire is wound around an iron core (former: mold). The thin-film superconducting wire used has a structure in which a superconducting layer made of, for example, ReBCO (Re-Ba-Cu-O, Re is a rare earth metal) is formed on a substrate via an intermediate layer, and a superconducting layer composed of A stabilizing layer composed of silver. [0003] When a current flows through such a superconductor, in order to allow the current to flow uniformly in the superconducting layer of each superconducting wire and to reduce the heat generation at the connection portion connected to the current wire that supplies the current, the connection of the current terminal portion The resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/68H01B12/02
CPCH01R4/68H02G15/34H01L39/143Y02E40/648Y02E40/60H10N60/80
Inventor 八木正史平田平雄铃木光男向山晋一塩原融
Owner FURUKAWA ELECTRIC CO LTD
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