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:
May. 28, 2013
Filed:
Nov. 30, 2010
Kazuhisa Tsutsumi, Tokyo, JP;
Masayuki Shimizu, Tokyo, JP;
Niall Caldwell, Lothian, GB;
Daniil Dumnov, Lothian, GB;
Stephen Laird, Lothian, GB;
Venkata Pappala, London, GB;
Kazuhisa Tsutsumi, Tokyo, JP;
Masayuki Shimizu, Tokyo, JP;
Niall Caldwell, Lothian, GB;
Daniil Dumnov, Lothian, GB;
Stephen Laird, Lothian, GB;
Venkata Pappala, London, GB;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
An object of the invention is to provide a wind turbine generator or a tidal current generator which is equipped with a hydraulic transmission and achieves a superior power generation efficiency, and a operation method thereof. The wind turbine generatorcomprises a hydraulic pumpof a variable displacement type which is rotated by the main shaft, a hydraulic motorof a variable displacement type which is connected to the generator, and a high pressure oil lineand a low pressure oil linewhich are arranged between the hydraulic pumpand the hydraulic motor. The pump controllerobtains a target torque of the hydraulic pumpat which a power coefficient becomes maximum, and then sets a displacement Dof the hydraulic pumpbased on the target torque and the pressure in the high pressure oil line. The motor controllersets a displacement Dof the hydraulic pumpbased on a discharge amount Qof the hydraulic pump obtained from the displacement Dof the hydraulic pumpso that the rotation seed of the generatorbecomes constant.