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:
Jan. 10, 2012
Filed:
Jul. 01, 2009
Applicants:
Shinya Oohara, Hitachi, JP;
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Tadashi Sodeyama, Hitachi, JP;
Inventors:
Shinya Oohara, Hitachi, JP;
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Tadashi Sodeyama, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03B 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked condition whereas the generator-side power converter continues its operation.