Rotor braking device e.g. for wind energy plant, has rotor blades mounted to rotate on rotor with electrical devices in rotor hub such as actuator for rotation of rotor blades

摘要

The device has rotor blades (3) mounted to rotate on a rotor with electrical devices in the rotor hub (2), such as an actuator (4, 5) for the rotation of the rotor blades. On drop-out of a power supply to the electrical devices, a rotor brake is activated (11). The rotor blades as a result of the braking torque of the rotor brake are rotated into a feathered position by the inertia. An independent claim is included for a method for braking the rotor of a wind energy plant.