The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Mar. 13, 1991
Hitoshi Shimizu, Yokohama, JP;
Katsuro Oishi, Yokohama, JP;
Masaru Ikeda, Tokyo, JP;
Yasuzo Tanaka, Yokohama, JP;
Shirabe Akita, Tokyo, JP;
Osami Tsukamoto, Yokohama, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Central Research Institute of Electric Power Industry, Tokyo, JP;
Abstract
There is provided a superconducting strand for alternating current which is formed by stranding 13 or more superconducting wires having a diameter smaller than that of a non-magnetic core member in a single-layered form on the outer peripheral surface of the core member and which can efficiently remove heat caused by AC loss, avoid a quenching phenomenon and stably maintain the superconducting state. Preferably, an electrically insulataive braided layer formed of polyester fiber is interposed between the core member and the stranded superconducting wires and stable insulation can be maintained therebetween, thereby preventing flow of coupling current caused by defective insulation and suppressing partial heat generation. The superconducting wire contains a large number of NbTi superconducting filaments and a non-magnetic stainless steel wire can be preferably used for the core member.