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:
Mar. 06, 2012
Filed:
Jun. 02, 2008
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Hiromitsu Sakai, Tokai, JP;
Kojiro Yamashita, Hitachinaka, JP;
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Hiromitsu Sakai, Tokai, JP;
Kojiro Yamashita, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a wind power generation system, an energy consuming unit is connected to a DC part of a generator-side converter. A shunt circuit is connected between the generator-side converter and a rotor of an AC-excited power generator. In the event of system failure, the switching operation of the converter is stopped, the shunt circuit is put into operation, and the energy consuming unit is put into operation so that DC voltage (voltage of the DC part) is maintained within a prescribed range.