Back to results
US 2012/0057978 A1Published application
Wind turbine with low electromagnetic radiation
AssigneeVestas Wind Systems A/S
InventorJohn Nieuwenhuizen
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeVestas Wind Systems A/S
InventorJohn Nieuwenhuizen
Estimating the term…
The invention provides a wind turbine with a lightning arrester system including one or more lightning receptors (R) mounted on one or more rotor blades. A down conductor electrically connects one or more lightning receptors (R) to electrical ground via a sliding contact arrangement (SC), and an electromagnetic radiation (EM) reduction device encircles a portion of the down conductor so as to reduce EM radiation from the down conductor due to static electric discharges caused by imperfect electric contact in the sliding contact arrangement (SC). Known types of EM radiation reduction devices in the form of commercially available common mode choke coils, cylindrically shaped nano-crystalline solid body types, or the like, can be used. A plurality of different types with different EM radiation reduction properties can be used in combination. To obtain more effective EM radiation reduction, a plurality of EM radiation reduction devices can be used, e.g. positioned at several portions of the down conductor, especially close to sliding contact arrangements (SC).
A wind turbine comprising:
A lightning arrester system comprising:
A method of reducing electromagnetic radiation from a wind turbine, where the wind turbine includes at least two rotor blades arranged for rotation in relation to a nacelle, a tower arranged for carrying the nacelle, and a lightning arrester system including one or more lightning receptors mounted on the one or more rotor blades as well as a down conductor arranged for electrically connecting the one or more lightning receptors to electrical ground, and where the down conductor includes a sliding contact arrangement, wherein the method comprises arranging an electromagnetic radiation reduction device relative to the down conductor so that at least a portion of the down conductor is encircled by the electromagnetic radiation device.
Dependencies are inferred from the claim text.