Abstract: A wind turbine includes a rotor shaft configured for operation by a rotor; a drive shaft configured to be driven by the rotor shaft; and a generator driven by the drive shaft. The wind turbine further includes a hydraulic cylinder arrangement acting between the rotor shaft and the drive shaft. The hydraulic cylinder arrangement is configured to allow relative rotation between the rotor shaft and the drive shaft.

Abstract: A wind turbine includes a rotor shaft configured for operation by a rotor; a drive shaft configured to be driven by the rotor shaft; a generator driven by the drive shaft and a torque control mechanism provided between the rotor shaft and the drive shaft. The torque control mechanism includes at least two links extending between the rotor shaft and the drive shaft. The links include a first end and a second end, the first end being pivotably connected to the rotor shaft and the second end being pivotably connected to the drive shaft. The length of each link is variable.