emergency operating capability stepping device for adjusting a rotor blade of a hydroelectric or wind power plant

摘要

Emergency operating capacity stepping device for adjusting a rotor blade of a hydroelectric or wind power plant The invention relates to a stepping device (10) with emergency stepping capability for one-step adjustment of rotor blade of a wind or hydroelectric power plant. the step drive device (10) comprises an inverter device (14) and a three phase current drive motor. the drive motor is deployed as a three phase ipm synchronous motor (12) (interior permanent magnet). a direct current power storage device (20) may advantageously be substantially and directly connected to an intermediate direct current circuit (18), at least for emergency operation, between a rectifier device (16) and the inverter device (14) for at least briefly supplying power to the synchronous motor (12) so that the ipm synchronous motor (12) can be operated at least briefly under speed control when the intermediate circuit voltage uzk is finds it falling. The invention enables speed controlled emergency operation of the high torque stepper drive device when an uzk intermediate circuit voltage is falling in emergency operation, where the direct current energy storage device may, for example, Improve efficiency as an energy compensator, and reduce current transfer through the rotor contact ring.