The Furukawa Electric Co., Ltd.

Tohoku University

Tokai University Educational System

Daisuke Asami

Takumi Sato

Hisaki Sakamoto

Masahiro Sugimoto

Tomoya Kato

Hirokazu Tsubouchi

Hideki Ii

Satoshi Awaji

Kota Katayama

Yonghoon Kim

Hidetoshi Oguro

A compound superconducting twisted wire includes compound superconducting strands being twisted to form a twisted structure, in which each of the compound superconducting strands includes a compound superconductor part, a reinforcing part and a stabilizing part. The compound superconductor part includes compound superconducting filaments and a first matrix, the compound superconducting filaments each including a compound superconducting phase. The reinforcing part is disposed on an outer circumferential side of the compound superconductor part and includes reinforcing filaments and a second matrix. The stabilizing part is disposed on at least one side of an inner circumferential side and an outer circumferential side of the reinforcing part. 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.

Compound superconducting twisted wire and rewinding method for compound superconducting twisted wire

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 surface of the frame such that wires adjacent to each other in an axial direction of the frame are arranged side by side and separated, the wire including an NbTi-based or NbSn-based wire having a surface coated with copper or copper alloy, in which at least a thermoplastic fusible resin is provided in a separated section between the adjacent wires, and when viewed in a cross section including an axis of the frame, at least one of voids that are partitionable on outer surfaces of a total of three wires and a total of four wires located on the two adjacent layers and adjacent to each other are 4% or less in terms of a void ratio (V1).

Superconducting coil, method for producing same, and superconducting rectangular wire for superconducting coil

Growing community of inventors

Tokyo, Japan

Daisuke Asami