Lightning protection structure of blade for wind power generation
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United States of America Patent
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Sep 15, 2015
Grant Date -
Apr 25, 2013
app pub date -
Jun 22, 2011
filing date -
Jun 30, 2010
priority date (Note) -
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Abstract
A blade for wind power generation includes a lightning receptor configured to form a part of the surface of the blade, and a lightning receiving protrusion that protrudes outward from the surface of the lightning receptor. The lightning receiving protrusion is provided to a surface boundary between the blade and the lightning receptor. The surface boundary configured to protect against the lightning is positioned within a radius of a circle, which is centered on a tip of the lightning receiving protrusion and which has a radius of twice the length of the lightning receiving protrusion. A point where electric field concentration on the surface of the lightning receptor is greatest is moved from the boundary to the tip of the lightning receiving protrusion, so as to significantly reduce a possibility of blade damage associated with lightning striking the boundary when being stroke by the lightning.
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