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. 19, 2015
Filed:
Jun. 03, 2011
Applicant:
Shigeo Yoshida, Tokyo, JP;
Inventor:
Shigeo Yoshida, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F03D 7/04 (2006.01); F03D 7/02 (2006.01);
U.S. Cl.
CPC ...
F03D 7/024 (2013.01); F03D 7/044 (2013.01); F03D 7/042 (2013.01); F03D 7/0212 (2013.01); F03D 7/043 (2013.01); F03D 7/0204 (2013.01); F03D 7/0224 (2013.01); F05B 2240/2213 (2013.01); F05B 2260/901 (2013.01); F05B 2270/326 (2013.01); F05B 2270/329 (2013.01); Y02E 10/723 (2013.01);
Abstract
A control apparatus C of a horizontal axis wind turbine apparatus WTG calculates the value en of a pitch angle command for each blade based on the rate of change ΨD of the azimuth angle Ψ of a Nacelle N and the rotor azimuth angle of the blades B, Band B, causes the rotor R to generated torque around the yaw axis by periodically controlling the angle change of the pitch angle of the blades B, Band B, and using that torque, controls the rate of change of the azimuth angle of the nacelle N. The value of that angle change is calculated as a value that increases as the inputted value of the rate of the change ΨD increases.