Variable diameter wind turbine rotor blades
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United States of America Patent
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Dec 6, 2005
Grant Date -
Dec 18, 2003
app pub date -
May 28, 2002
filing date -
May 28, 2002
priority date (Note) -
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Abstract
A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can have more than one extension in a variety of configurations. A cable winching system, a hydraulic system, a pneumatic system, inflatable or elastic extensions, and a spring-loaded jack knife deployment are some of the methods of adjustment. The extension is also protected from lightning by a grounding system.
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