The Furukawa Electric Co., Ltd.

International Superconductivity Technology Center

International Superconductivity Center, the Juridical Foundation

Hirao Hirata

Masashi Yagi

Shinichi Mukoyama

Yuh Shiohara

Tomoya Nomura

Takaharu Mitsuhashi

Mitsuo Suzuki

Tokui Yonemura

A terminal connecting part has: a low temperature container filled with a cooling medium; a conductor current lead which has one end immersed in the cooling medium and the other end led to a normal temperature part; and a conductor movable connecting terminal which electrically connects a superconductive conductor layer and the conductor current lead of a superconducting cable. The superconductive conductor layer of the superconducting cable stripped stepwise from a front end is connected to the conductor current lead through the conductor movable connecting terminal. The cable core of the superconducting cable is movable in a longitudinal direction and is rotatable in a circumferential direction while maintaining electrical connection between the superconductive conductor layer and the conductor current lead. The cable core is horizontally supported in the low temperature container.

Terminal connecting part of superconducting cable

A connection structure for superconducting cables includes: superconducting cables that are connected to each other and include cable cores containing formers and superconducting conductor layers, and each cable core is housed in a thermal insulation tube with a cooling medium, wherein the cable cores include electric insulating layers obtained by winding insulating sheets around the superconducting conductor layers, the electric insulating layers on both sides of a conductor connecting part, in which the formers and the superconducting conductor layers are connected to each other, include taper shape portions each having a diameter reducing towards the conductor connecting part, each taper shape portion is formed so as to have an inclination angle changing in a stepwise fashion by a plurality of tapered portions among which a tapered portion nearer the conductor connecting part has smaller inclination angle, and a reinforcing insulating layer is provided between the taper shape portions.

Connection structure for superconducting cables

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

Current terminal structure of superconducting wire and superconducting cable having the current terminal structure

A thin film superconductive wire material () and an electro conductive tape () are immersed in a solder bath () containing a solder, which includes Sn(tin) and Bi (bismuth), to bond the thin film superconductive wire material () and the electro conductive tape () and a composite superconductive wire material () is formed.

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Tokyo, Japan

Hirao Hirata