US 12,168,972 B2
Reduction of a pitch bearing damage
Johannes Gerhardes Wardjan Alberts, Brøndby Strand (DK); and Gustav Hoegh, Vejle (DK)
Assigned to Siemens Gamesa Renewable Energy A/S, Brande (DK)
Appl. No. 18/022,561
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Aug. 18, 2021, PCT No. PCT/EP2021/072878
§ 371(c)(1), (2) Date Feb. 22, 2023,
PCT Pub. No. WO2022/043144, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 20193415 (EP), filed on Aug. 28, 2020.
Prior Publication US 2023/0323865 A1, Oct. 12, 2023
Int. Cl. F03D 80/70 (2016.01); F03D 7/02 (2006.01); F03D 17/00 (2016.01)
CPC F03D 80/70 (2016.05) [F03D 7/0224 (2013.01); F03D 17/00 (2016.05); F05B 2260/83 (2013.01); F05B 2270/328 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of determining a value of a pitch speed for a pitch actuator of a rotor blade of a wind turbine and adjusting a pitch angle of the rotor blade, the method comprising:
providing a quantity being indicative of a value of a bearing moment of the rotor blade;
determining the value of the pitch speed based on the quantity and a reference quantity indicative of a reference value of the bearing moment of the rotor blade,
wherein, when the quantity indicates that the value of the bearing moment of the rotor blade is below the reference value of the bearing moment of the rotor blade,
the value of the pitch speed is determined to be above a reference value of the pitch speed,
wherein the value of the pitch speed is determined based on a parameter related to a low value of the bearing moment,
wherein the parameter related to the low value of the bearing moment indicates at which bearing moment the value of the pitch speed should be a maximal value of the pitch speed; and
adjusting, by the pitch actuator, the pitch angle of the rotor blade based on a target pitch angle and the determined value of the pitch speed.