초록 ▼

In order to provide a flexible oxide superconducting cable conductor which is reduced in ac loss, tape-shaped multifilamentary superconducting wires covered with a stabilizing metal are spirally wound on a flexible former. Each of the multifilamentary superconducting wires has a plurality of filamen

In order to provide a flexible oxide superconducting cable conductor which is reduced in ac loss, tape-shaped multifilamentary superconducting wires covered with a stabilizing metal are spirally wound on a flexible former. Each of the multifilamentary superconducting wires has a plurality of filaments. The filament contains an oxide superconductor. The superconducting wires are preferably wound on the former at a bending strain of not more than 0.3 %. In winding on the former, a prescribed number of tape-shaped multifilamentary superconducting wires are wound on a core member in a side-by-side manner, to form a first layer. Then, an insulating layer is provided on the first layer. This insulating layer can be formed by an insulating tape. A prescribed number of tape-shaped superconducting multifilamentary wires are wound on the insulating layer in a side-by-side manner, to form a second layer. The insulating layer is adapted to reduce ac loss of the conductors. When the former is made of a metal, it is more preferable to provide an insulating layer between the former and the multifilamentary superconducting wires.

대표청구항 ▼

[ What is claimed is:] [1.] An ac superconducting cable conductor employing an oxide superconductor, comprising:a flexible long core member;a plurality of tape-shaped multifilamentary oxide superconducting wires being spirally wound on said core member with tension of not more than 2 kgf/mm.sup.2 an

[ What is claimed is:] [1.] An ac superconducting cable conductor employing an oxide superconductor, comprising:a flexible long core member;a plurality of tape-shaped multifilamentary oxide superconducting wires being spirally wound on said core member with tension of not more than 2 kgf/mm.sup.2 and at a bending strain of not more than 0.3% andan electric insulating layer,each said tape-shaped multifilamentary superconducting wire including a plurality of filaments consisting essentially of an oxide superconductor, and a stabilizing metal covering the same,said plurality of tape-shaped superconducting wires forming a plurality of layers each being formed by winding a plurality of said tape-shaped superconducting wires in a side-by-side manner,said plurality of layers being successively stacked on said core member,said insulating layer being at least provided between said plurality of layers,said core member providing said superconducting cable conductor with flexibility,said superconducting cable conductor capable of maintaining a superconducting state at the liquid nitrogen temperature,said filaments having substantially homogeneous superconducting phases along the longitudinal direction of said tape wire,c-axes of said superconducting phases being oriented substantially in parallel with the direction of thickness of said wire,said filaments being formed by crystal grains in the form of flakes extending along the longitudinal direction of said tape wire,said flaky crystal grains being stacked along the direction of thickness of said tape wire.