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    COMPOUND SUPERCONDUCTING TWISTED WIRE AND REWINDING METHOD FOR COMPOUND SUPERCONDUCTING TWISTED WIRE
    2.
    发明公开
    COMPOUND SUPERCONDUCTING TWISTED WIRE AND REWINDING METHOD FOR COMPOUND SUPERCONDUCTING TWISTED WIRE 审中-公开

    公开(公告)号：EP3859754A1

    公开(公告)日：2021-08-04

    申请号：EP19865613.4

    申请日：2019-09-20

    Applicant: FURUKAWA ELECTRIC CO., LTD. ,  Tohoku University ,  TOKAI UNIVERSITY EDUCATIONAL SYSTEM

    Inventor： SUGIMOTO, Masahiro ,  TSUBOUCHI, Hirokazu ,  ASAMI, Daisuke ,  II, Hideki ,  AWAJI, Satoshi ,  OGURO, Hidetoshi

    IPC: H01B12/08 ,  H01B13/00 ,  H01F6/06

    Abstract: The present invention provides: a compound superconducting twisted wire in which non-adhesiveness between compound superconducting strands or separation easiness after adhesion is improved while a strength against tension is improved to a degree to be equivalent to or stronger than that of a conventional compound superconducting twisted wire; and a rewinding method thereof. The compound superconducting twisted wire 1 of the present invention includes a plurality of compound superconducting strands 10 being twisted to form a twisted structure, in which each of the compound superconducting strands 10 includes a compound superconductor part 11, a reinforcing part 12 and a stabilizing part 13, in which the compound superconductor part 11 includes a plurality of compound superconducting filaments 15 and a first matrix 16, the compound superconducting filaments 15 each including a compound superconducting phase, in which the reinforcing part 12 is disposed on an outer circumferential side of the compound superconductor part, and comprises a plurality of reinforcing filaments 18 and a second matrix 19, in which the stabilizing part 13 is disposed on at least one side of an inner circumferential side and an outer circumferential side of the reinforcing part. In the compound superconducting twisted wire, a volume ratio of the reinforcing part relative to the compound superconducting strand is larger than a volume ratio of the compound superconductor part relative to the compound superconducting strand, or a metal layer 20 with a thickness of 2 µm or less is formed on a surface of the compound superconducting strand for preventing thermal fusion between the compound superconducting strands.

    SUPERCONDUCTING COIL, METHOD FOR PRODUCING SAME, AND RECTANGULAR SUPERCONDUCTING WIRE MATERIAL FOR SUPERCONDUCTING COIL
    6.
    发明公开
    SUPERCONDUCTING COIL, METHOD FOR PRODUCING SAME, AND RECTANGULAR SUPERCONDUCTING WIRE MATERIAL FOR SUPERCONDUCTING COIL 审中-公开

    公开(公告)号：EP4064301A1

    公开(公告)日：2022-09-28

    申请号：EP20889392.5

    申请日：2020-11-18

    Applicant: Furukawa Electric Co., Ltd.

    Inventor： KIM, Yonghoon ,  II, Hideki ,  SATO, Takumi ,  ASAMI, Daisuke ,  SUGIMOTO, Masahiro ,  TSUBOUCHI, Hirokazu

    IPC: H01F6/06 ,  H01B12/04

    Abstract: The superconducting coil includes: a winding frame; and at least two superconducting rectangular wire layers provided in such a manner that a superconducting rectangular wire is spirally wound on an outer peripheral surface of the winding frame in a substantially circumferential direction of the winding frame such that wires adjacent to each other in an axial direction of the winding frame are arranged side by side and separated from each other, the superconducting rectangular wire including an NbTi-based or Nb 3 Sn-based wire having a surface coated with copper or copper alloy and having a substantially rectangular cross-section, in which at least a thermoplastic fusible resin is provided in a separated section between the adjacent wires in the same superconducting rectangular wire layer and a separated section between the adjacent wires that are located respectively in the two superconducting rectangular wire layers adjacent to each other, and when viewed in a cross section including an axis of the winding frame, at least one of voids that are partitionable on outer surfaces of a total of three superconducting rectangular wires and are partitionable on outer surfaces of a total of four superconducting rectangular wires located on the two adjacent superconducting rectangular wire layers and adjacent to each other are 4% or less in terms of a void ratio (V1), which is an area ratio of the voids occupying the at least two superconducting rectangular wire layers.

    INSULATION COATING COMPOUND SUPERCONDUCTING WIRE AND REWINDING METHOD THEREOF
    7.
    发明公开
    INSULATION COATING COMPOUND SUPERCONDUCTING WIRE AND REWINDING METHOD THEREOF 审中-公开

    公开(公告)号：EP3859755A1

    公开(公告)日：2021-08-04

    申请号：EP19867242.0

    申请日：2019-09-20

    Applicant: FURUKAWA ELECTRIC CO., LTD.

    Inventor： SUGIMOTO, Masahiro ,  TSUBOUCHI, Hirokazu ,  KATAYAMA, Kota ,  II, Hideki

    IPC: H01B12/10 ,  H01F6/06

    Abstract: The present invention provides: an insulation-coated compound superconducting wire which has excellent superconducting characteristics, exhibits a tensile strength equal to or larger than that of the conventional compound superconducting wire at both room temperature and extremely low temperature, also has excellent winding property, and enables a superconducting coil to be commercially produced; and a rewinding method thereof. The insulation-coated compound superconducting wire 1 according to the present invention includes: a compound superconducting wire 10 having a compound superconducting part 11 which includes a first matrix 16 and a plurality of compound superconducting filaments 15 containing compound superconducting phases, a reinforcing part 12 which is disposed on the outer circumferential side of the compound superconducting part 11 and includes a plurality of reinforced filaments 18, a second matrix 19 and a second stabilizing material 20, and a stabilizing part 13 which is disposed on at least one side among the inner circumferential side and the outer circumferential side of the reinforcing part 12; and an electrical insulation part 30 which covers the outer circumferential surface of the compound superconducting wire 10, in which the insulation-coated compound superconducting wire 1 has a critical current value (Ic) larger than that of the compound superconducting wire 10 before being covered with the electrical insulation part 30.

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