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. 23, 1988
Filed:
Sep. 24, 1986
Eiji Haraguchi, Ibaraki, JP;
Hiroto Nakagawa, Osaka, JP;
Akira Bando, Hitachi, JP;
Yoji Tanaka, Hitachi, JP;
Kenichi Ono, Hitachi, JP;
Hiroshi Kashiwazaki, Hitachi, JP;
Hiroshi Sugisaka, Hitachi, JP;
Hitachi, Ltd., Both of Tokyo, JP;
The Kansai Electric Power Co., Both of Tokyo, JP;
Abstract
An induction generator/motor system has an induction machine connected at its secondary side to a cyclo-converter. An induced voltage develops when the cyclo-converter pauses during a transient phenomenon occurring in the system. When the induced voltage exceeds a predetermined voltage range which covers the maximum output voltage derivable from the cyclo-converter, the polarity of thyristor converters of the cyclo-converter is switched such that the induced voltage is applied to a thyristor converter to be rendered conductive next in forward relationship therewith, thereby preventing occurrence of an overvoltage.