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:
Aug. 02, 2011
Filed:
Aug. 06, 2008
Yoshiya Higuchi, Tokai, JP;
Mitsushi Abe, Hitachinaka, JP;
Ryuya Ando, Hitachi, JP;
Tsutomu Yamamoto, Hitachi, JP;
Takuro Honda, Mito, JP;
Yoshiya Higuchi, Tokai, JP;
Mitsushi Abe, Hitachinaka, JP;
Ryuya Ando, Hitachi, JP;
Tsutomu Yamamoto, Hitachi, JP;
Takuro Honda, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which a superconducting fault current limiter and a second superconducting persistent current switch are connected in series, are connected to a series circuit of the first main coil and the second main coil in parallel; a first closed circuit in which at least one of the first main coil and the first shield coil, and a first quench protection circuit are connected in series; and a second closed circuit in which one of the second main coil and the second shield coil, and a second quench protection circuit are connected in series.