초록 ▼

The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a controller and a first drive system for adjusting a pitch angle of the first rotor blade, wherein the drive system is adapted to transform rotational energy of the rotor bla

The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a controller and a first drive system for adjusting a pitch angle of the first rotor blade, wherein the drive system is adapted to transform rotational energy of the rotor blade rotating about its longitudinal axis into another form of energy such that a counter torque against the rotating direction is induced. Further, it concerns a method for controlling a pitch velocity of a rotor blade of a wind turbine, the wind turbine comprising at least one drive system for adjusting a pitch angle of said rotor blade, the drive system being adapted to operate in a active mode, wherein the drive system rotates the rotor blade, and in a passive mode, wherein the drive system exerts a counter force against the rotating direction, when the rotor blade being rotated by another force than the force of the drive system, wherein the pitch velocity is controlled by operating the drive system in said passive mode when the pitch of the rotor blade is changed from a first position to a second position.

대표청구항 ▼

What is claimed is: 1. A wind turbine comprising:a rotor comprising a first rotor blade having a longitudinal axis; anda pitch control system comprising a first drive system for generating a force to adjust a pitch angle of the first rotor blade in an active mode,wherein the first drive system is co

What is claimed is: 1. A wind turbine comprising:a rotor comprising a first rotor blade having a longitudinal axis; anda pitch control system comprising a first drive system for generating a force to adjust a pitch angle of the first rotor blade in an active mode,wherein the first drive system is configured to transform a rotational movement of the first rotor blade about the longitudinal axis into another form of energy such that a counter torque against the rotational movement is induced in a passive mode, the counter torque being different from the force, andwherein the pitch control system is configured to control the counter torque for controlling an angular velocity of the first rotor blade in the rotational movement.