| 摘要 |
An emergency pitch drive unit for a wind turbine comprises: an electrical motor 142 arranged for adjusting the pitch angle of a wind turbine rotor blade 140; an emergency power supply unit 200 for supplying electrical power to the motor 142; and a controller 144 configured for controlling, in the event of a power failure, the motor 142 to adjust the pitch angle using the electrical power from the emergency power supply unit 200. The emergency power supply unit 200 comprises a fuel cell. |
