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:
Jun. 11, 2013
Filed:
May. 21, 2010
Shigeo Yoshida, Tokyo, JP;
Shigeo Yoshida, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The object of the invention is to construct a horizontal-axis wind turbine comprising a dual-system pitch drive unit for one blade that is independent up to the transmission mechanism or a dual-system yaw drive unit for one wind turbine nacelle that is independent up to the transmission mechanism, and to provide the dual system with new applicability. The horizontal-axis wind turbine of the present invention has a huband a bladethat are connected by way of an interposed sectionwhich can freely rotate around the pitch axis of the blade with respect to both the hub and the blade; and further comprises: a hub-side interposed section drive unitthat relatively rotates the interposed section with respect to the hub, and a blade-side interposed section drive unitthat relatively rotates the blade with respect to the interposed section. The horizontal-axis wind turbine further comprises a hub-side interposed section angle sensor, a blade-side interposed section angle sensor and hub-side blade angle sensor, and is configured to control the pitch angle of the blade with respect to the hub whether controlling both drive units or controlling only one drive unit. Similar connection mechanism and drive and control mechanism is applied to between a tower and a nacelle.