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:
Jul. 24, 2012
Filed:
Oct. 30, 2007
Applicant:
Garrett Lee Bywaters, Waitsfield, VT (US);
Inventor:
Garrett Lee Bywaters, Waitsfield, VT (US);
Assignee:
Northern Power Systems Utility Scale, Inc., Barre, VT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wind turbine system is provided for geographic regions having multiple soil layers, such as permafrost. The wind turbine includes a plurality of blades mounted to a nacelle on top of a tower. The tower is supported by a foundation that extends through or into the multiple soil layers. The wind turbine monitors the condition of a top layer of soil and calculates a natural frequency for the wind turbine system based on the changes to the layer of soil. Changes in operation of the wind turbine are made in response to changes in the natural frequency of the wind turbine system.