Other

Fujikura Limited

Fuji Electric Systems Co. Ltd.

Railway Technical Research Institute

Kyushu Electric Power Co., Inc.

International Superconductivity Technology Center, the Juridical Foundation

Superconductivity Research Laboratory, International Superconductivity Technology Center, the Juridical Foundation

International Superconductivity Technology Center, Juridical Foundation

Akira Tomioka

Yuh Shiohara

Teruo Izumi

Hiroshi Fuji

Masataka Iwakuma

Kazuo Funaki

Toshio Uede

Takanobu Kisu

Kenji Suzuki

Masayuki Konno

Hidemi Hayashi

Tape-shaped superconducting wires, and a superconducting coil formed from said wires, wherein a plurality of electrically separated superconducting film parts, each having a rectangular cross section and arranged in parallel, form parallel conductors, providing superconducting wires capable of containing losses incurred in the presence of alternating current (A/C). A superconducting coil is made by winding the superconducting wires, wherein the coil structure contains at least a part wherein perpendicular interlinkage magnetic fluxes acting among conductor elements of the parallel conductors by the distribution of magnetic fields generated by the superconducting coils cancel mutually in order to contain circulating current within the wires and to make shunt current uniform, thereby providing a low-loss A/C superconducting coil.

Superconducting wire and superconducting coil made therewith

Superconducting wire and superconducting coil employing it

In one embodiment, a superconducting coil includes a tertiary parallel superconductor unit () composed of superposed in parallel a plurality of layers of secondary parallel superconductor units (). The layers of secondary parallel superconductor units include a plurality of superconductor elements () arranged in parallel along the axial direction of the coil, forming a superconducting conductor unit. The tertiary parallel superconductor unit is wound on a bobbin (). In another embodiment, the superconducting coil includes one or more layers of the secondary parallel superconductor unit wound on the bobbin. In both embodiments, the secondary parallel superconductor unit can include at least one non-superconducting conductor element (). The layer of the secondary parallel superconductor unit forming an outer side of the tertiary parallel superconductor unit can include at least one non-superconducting conductor element. A layer of non-superconducting conducting or high-strength insulating supporting member () of electromagnetic force can be formed on the outer side of the tertiary parallel superconductor unit.

Superconducting coil

Growing community of inventors

Yokosuka, Japan

Akira Tomioka