US 12,345,235 B2
Method for reducing gear induced noise from a wind turbine
Peter Mongeau, Center Conway, NH (US); Kent Tange, Ry (DK); Andreas Langbak, Aalborg (DK); and Tobias Philipp Roman Duda, Lübeck (DE)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Filed on Sep. 13, 2024, as Appl. No. 18/885,351.
Claims priority of provisional application 63/609,074, filed on Dec. 12, 2023.
Claims priority of application No. PA 2024 30025 (DK), filed on Jan. 18, 2024.
Prior Publication US 2025/0188903 A1, Jun. 12, 2025
Int. Cl. F03D 7/02 (2006.01); F03D 15/00 (2016.01); F03D 17/00 (2016.01); F03D 80/00 (2016.01)
CPC F03D 7/0296 (2013.01) [F03D 15/00 (2016.05); F03D 17/015 (2023.08); F03D 17/033 (2023.08); F03D 80/005 (2023.08); F05B 2260/4031 (2013.01); F05B 2260/96 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for reducing gear induced noise from a wind turbine, the wind turbine comprising a rotor, a generator and a gearbox interconnecting the rotor and the generator, the method comprising:
during operation of the wind turbine, generating a first vibration map in a form of a table specifying, for each of a plurality of operating points of the generator, a virtual phase of vibrations originating from gear tooth meshing of the gearbox, relative to a first reference phase, at the respective operating points, each operating point being defined by a rotational speed and a torque of the generator,
at a later point in time, operating the wind turbine and generating a second vibration map in the form of a table specifying, for each of a plurality of operating points of the generator, a virtual phase of vibrations originating from gear tooth meshing of the gearbox, relative to a second reference phase that is different than the first reference phase, at the respective operating points,
identifying an overlap between operating points of the first vibration map and operating points of the second vibration map,
for at least some of the operating points within the identified overlap, comparing the virtual phase of vibrations of the first vibration map and the virtual phase of vibrations of the second vibration map, and deriving a phase offset between the first vibration map and the second vibration map, based on the comparison, wherein the phase offset represents a difference between the first reference phase and the second reference phase,
adjusting the virtual phase of vibrations of each of the operating points of the second vibration map by a value corresponding to the derived phase offset, so as to align the first vibration map and the second vibration map,
combining the first vibration map and the second vibration map into a resultant vibration map, and
controlling operation of the generator in accordance with the resultant vibration map.