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. 14, 2012
Filed:
Aug. 20, 2007
Shinya Oohara, Hitachi, JP;
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Kazuya Tsutsumi, Hitachinaka, JP;
Takashi Shiraishi, Utsunomiya, JP;
Shigeo Yoshida, Utsunomiya, JP;
Hajime Komiyama, Utsunomiya, JP;
Junichi Sugino, Utsunomiya, JP;
Shinya Oohara, Hitachi, JP;
Masaya Ichinose, Hitachiota, JP;
Motoo Futami, Hitachiota, JP;
Kazuya Tsutsumi, Hitachinaka, JP;
Takashi Shiraishi, Utsunomiya, JP;
Shigeo Yoshida, Utsunomiya, JP;
Hajime Komiyama, Utsunomiya, JP;
Junichi Sugino, Utsunomiya, JP;
Hitachi, Ltd., Tokyo, JP;
Fuji Heavy Industries Ltd., Tokyo, JP;
Abstract
A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.