Adjusting pitch of wind turbine blades in emergency situation.

摘要

The device has an emergency current supply unit (2), which is coupled with a network current supply unit (1). A rectifier is provided for electrical power flow from a current network to a shifting motor (3). An energy storage (8) is coupled at an intermediate circuit (5) of the network current supply unit by a transducer, such that the intermediate circuit voltage is supplied in the normal operation.