Terminal structure for superconducting cable and method for manufacturing same

Abstract

Provided is a terminal structure for a superconducting cable that causes an electrode and a superconducting cable to be easily and favorably connected with reduced contact resistance. In the superconducting cable, a superconducting wire in which a superconducting layer is provided on a substrate interposed by an intermediate layer is wound around a core so that the superconducting layer becomes the inner periphery side and the substrate becomes the outer periphery side. In the terminal structure, the superconducting cable (110) has a plurality of superconducting wires (113, 115), in which a superconducting layer is provided on the substrate interposed by an intermediate layer, and the plurality of superconducting wires (113, 115) are arranged in multiple layers so as to be wound concentrically around a core (111) so that the superconducting layer becomes the inner periphery side and the substrate becomes the outer periphery side. The superconducting cable (110) is arranged inside a tubular electrode (120) and the inner surface of the tubular electrode (120) is soldered to the substrate-side surface of, among the plurality of superconducting wires (113, 115), the superconducting wire (113, 115) positioned at the outermost layer inside the tubular electrode (120).

Description

technical field [0001] The present invention relates to an end structure of a superconducting cable, and in particular, to an end structure of a superconducting cable in which a superconducting layer of a superconducting wire having a superconducting layer is spirally wound inside the cable. Background technique [0002] Conventionally, in a superconducting cable, a tape-shaped superconducting wire (hereinafter also referred to as “superconducting tape”) is wound helically around the outer periphery of a core material (former). In addition, in superconducting cables, superconducting tapes are usually arranged concentrically in multiple layers in order to transmit large currents. A pressure belt is provided between layers of superconducting tapes arranged in multiple layers (that is, between superconducting tapes), and the pressure tape presses the superconducting tapes and electrically insulates between the superconducting tapes. In addition, as a superconducting tape, REBa...

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Problems solved by technology

Thus, for the structure of connecting the superconducting tape to the connection surface of the outer surface of the electrode, it is necessary to accurately match the outer diameter of the connection surface of the outer surface with the outer diameter of the layer of the corresponding superconducting tape, with the connection surface The production of the normal conductor connecting parts is relatively cumbersome

In addition, during the assembly operation of the terminal structure, it is necessary to pay attention to the accurate connection between the superconducting strips of each layer and the connection surface of the corresponding normal-conducting connection parts at each layer, which is cumbersome.

In addition, in the case where these connections are performed one by one by manual operation, there is a problem that the connection resistance values ​​at the connection portions are prone to vary.

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