US 12,078,144 B2
Rotor blade for a wind turbine
Parag Rameshchandra Dharmadhikari, Garching b. München (DE)
Assigned to General Electric Renovables Espana, S.L., Barcelona (ES)
Appl. No. 18/043,120
Filed by General Electric Renovables Espana, S.L., Barcelona (ES)
PCT Filed Aug. 27, 2021, PCT No. PCT/EP2021/073786
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/043520, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 20193439 (EP), filed on Aug. 28, 2020.
Prior Publication US 2023/0313777 A1, Oct. 5, 2023
Int. Cl. F03D 1/06 (2006.01); F03D 80/30 (2016.01); F03D 80/40 (2016.01)
CPC F03D 1/0675 (2013.01) [F03D 80/30 (2016.05); F03D 80/40 (2016.05); F05B 2240/85 (2020.08)] 15 Claims
OG exemplary drawing
 
1. A rotor blade for a wind turbine, comprising:
a root section having a blade root; a tip section having a blade tip;
a middle section between the root section and the tip section;
a blade skin forming a suction surface and a pressure surface of the rotor blade;
an electric heating arrangement comprising at least one heating strip having a width-thickness relation configured to reduce an adhesive bonding between ice and the blade skin by electrically heating a respective surface of the blade skin and to conduct lightning-caused currents of at least 10 kA;
an energy transfer arrangement electrically connected to the heating arrangement to supply electrical energy to the heating arrangement; and
an integrated lightning arrangement, comprising:
a lightning receptor mounted to the tip section and electrically connected to the heating strip such that a totality of electrical energy of a lightning strike is conducted from the lightning receptor to the heating strip; and
a grounding device mounted to or in the root section and electrically connected to a grounding arrangement of the wind turbine such that electrical energy of a lightning strike is conducted from the heating strip through the grounding device and into the grounding arrangement.