EMERGENCY ADJUSTING DEVICE FOR BLADE ADJUSTING SYSTEMS OF WIND POWER PLANTS

摘要

An adjusting device for rotor blades of a wind power plant is disclosed. An AC motor is provided for adjusting the angle setting of the rotor blades. An input serves for receiving an input alternating current. A frequency converter is provided for generating a second alternating current having a second frequency, wherein the second alternating current drives the AC motor. Additionally, a DC voltage source and an inverter are provided for converting the voltage provided by the DC voltage source into an alternating current for the AC motor. The inverter is thereby separated from the frequency inverter.