Patent ID: 11959460
Assignee: VESTAS WIND SYSTEMS A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 12:
13. The method of claim 1 wherein the desired pitch angles of the stopping process are determined based on a stored pitch angle signal, wherein operating the stop controller further comprises:
prior to receipt of the rotor stop signal, generating the stored pitch angle signal using pitch angle signals for each of the one or more pitch adjustable rotor blades for at least a fraction of a rotor revolution;
either prior to receipt of the rotor stop signal, or upon receipt of the rotor stop signal, determining at least one periodic component of the stored pitch angle signal; and
after determining the at least one periodic component, implementing the stopping process by controlling the one or more pitch adjustable rotor blades towards the feathering position using a pitch control signal containing the at least one periodic component.