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:
Feb. 06, 2018
Filed:
Jul. 12, 2013
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 6/00 (2006.01); H01F 6/06 (2006.01); G01R 33/3815 (2006.01); H01L 39/20 (2006.01); G01R 33/34 (2006.01); G01R 33/36 (2006.01); H01F 6/04 (2006.01);
U.S. Cl.
CPC ...
H01F 6/06 (2013.01); G01R 33/3403 (2013.01); G01R 33/3664 (2013.01); G01R 33/3815 (2013.01); H01F 6/04 (2013.01); H01L 39/20 (2013.01);
Abstract
A technical problem is to turn a persistent current switch on and off at high speed with less heat input. The invention relates to a conductive cooling-type persistent current switch, including: a superconductive wirethrough which a current is passed; a cooling stagewhich cools the superconductive wire; and a heaterwhich heats the superconductive wire, wherein the superconductive wire is placed between faces which are each formed by the cooling stage and the heater, a core of the superconductive wire is magnesium diboride, and a base materialplaced around an outer periphery of the core is a material having a resistivity of 10 μΩcm or more at 40 K.