Rotor blade device for adjusting blade angle of rotor blade of wind turbine on rotor shaft, has two electro motor drive, in which primary has frequency converter and secondary has electro motor with standby energy storage

摘要

The rotor blade device has two electro motor drive, in which primary has a frequency converter (10) powered by a power grid and a brushless electro motor (6), supplied by the frequency converter with a standby energy storage (22), which provides a direct current voltage. Another electro motor drive, which has an electro motor stored by standby energy storage with direct current is provided, in which rotor blade (2) is adjusted in failure of primary electro motor drive. The device is mechanically operated by switching elements (8), which are available in a non-operated state.