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:
Aug. 26, 2014
Filed:
Dec. 02, 2011
Detlef Drossel, Norderstedt, DE;
Ulrich Harms, Hamburg, DE;
Detlef Drossel, Norderstedt, DE;
Ulrich Harms, Hamburg, DE;
Nordex Energy GmbH, Hamburg, DE;
Abstract
The invention relates to a method for monitoring a static and/or dynamic stability of a wind turbine. The wind turbine has a tower, a nacelle, which is supported by the tower, and a rotor, which is mounted in or on the nacelle and has at least one rotor blade which can be adjusted about its longitudinal axis. The method includes the following steps: the wind turbine is excited to oscillate in at least one direction. A frequency (f) of the excited oscillation is detected. The detected frequency is compared with a predetermined frequency (f) and an alarm signal is generated if the detected frequency deviates from the predetermined frequency by more than a difference value (Δf).