Device and method for determining a blade position and for ending a safety run

摘要

A wind turbine assembly has a hub, a rotor blade, a bearing that can be installed between the rotor blade and the hub, and an adjusting device. The rotor blade is arranged on the hub so as to be rotatable substantially its longitudinal axis. The adjusting device comprises at least one electric adjusting motor, which drives a gear connected to the rotor blade by means of a drive pinion, a converter coupled to an electric network and controlling the adjusting motor, and a control unit for the adjusting motor. The adjusting device comprises means for producing a signal that depends on the adjustment position of the rotor blade and an evaluating unit for comparing the signal or a derivative of the signal.

主权项

1. Adjusting device for a rotor blade of a rotor of a wind turbine,
comprising a rotor comprising a hub and at least one rotor blade, the rotor blade being installable on a bearing which is installable between the rotor blade and the hub, the rotor blade being adjustably arranged on the hub in different pitch positions for rotation about a blade axis which extends in an axial direction of the rotor blade, the adjusting device comprising an adjusting motor for driving and/or locking the rotor blade, a first device for determining a blade position, and a converter for controlling the adjusting motor the converter comprising at least one control unit,wherein
the first device comprises at least two first means for generating a respective electrical signal (S1a, S1b) that depends on the pitch position, the control unit and/or at least one evaluation unit have at least one signal input associated with a signal output of the at least two first means, the control unit can being connectable to the at least one evaluation unit for checking a redundancy of the electrical signals (S1a, S1b) of the at least two first means and for comparing the signals (S1a, S1b) of the at least two first means or a derivative of the signals (S1a, S1b) with at least one stored threshold value (λ), and the control unit and/or the evaluation unit are configured so as to terminate a blade adjustment process when a first threshold value (λ1) is exceeded.