Method for adjusting an adjustment device of a wind power plant

1. A method for adjusting an adjustment device of a wind power plant to rotate a movable part of the wind power plant, the adjustment device having at least two drive axles, each having a drive motor and being mechanically coupled to the movable part, the method comprising:

tensioning the at least two drive axles against each other prior to an adjustment by rotating at least one drive axle of the at least two drive axles relative to at least the other drive axle of the at least two drive axles; and

during the adjustment, using position control of the at least two drive axles to rotate the at least two drive axles together in a same direction of rotation, while maintaining the tensioning of the at least two drive axles, until a desired end position of the movable part is reached.

2. The method according to claim 1 , wherein the tensioning is carried out by rotating at least one drive axle in the direction of rotation opposite that of the other drive axles.

3. The method according to claim 1 , wherein the tensioning is carried out by rotating all the drive axles in the same direction of rotation, wherein at least one drive axle is rotated more slowly than the other drive axles.

4. The method according to claim 1 , wherein the tensioning is carried out by holding at least one drive axle while the other drive axles are rotated.

5. The method according to claim 1 , wherein the tensioning is maintained by maintaining the relative positions of the drive motors with respect to each other reached during tensioning of the drive axles.

6. The method according to claim 1 , wherein, during tensioning, a desired total torque is set as the sum of the individual drive torques of the drive axles.

7. The method according to claim 6 , wherein the total torque counteracts the desired movement of the movable part.

8. The method according to claim 1 , wherein at least one drive axle is defined as master drive axle and a number of the other drive axles follows the movement of the master drive axle.

9. The method according to claim 1 , wherein the drive axles are re-tensioned between the initial tensioning and the start of the adjustment.

10. The method according to claim 1 , wherein the at least two drive axles are rotated together via a position control.

11. A wind power plant having a movable part, comprising:

an adjustment device configured to rotate the movable part, the adjustment device having at least two drive axles, each having a drive motor and being mechanically coupled to the movable part;

wherein at least one of the at least two drive axles is rotated relative to at least the other drive axle of the at least two drive axles for tensioning the at least two drive axles, and

wherein a rotation of the at least two drive axles in a same direction of rotation is controlled using position control of the at least two drive axles, while maintaining the tensioning of the at least two drive axles, until a desired end position of the movable part is reached.

12. The wind power plant according to claim 11 , wherein the adjustment device is at least one of a wind direction tracking mechanism or a rotor blade adjustment mechanism.

13. The wind power plant according to claim 11 , further comprising a drive control unit configured for tensioning the at least two drive axles.

14. The wind power plant according to claim 13 , further comprising a position control of the at least two drive axles configured to control rotation of the at least two drive axles to the predetermined set points,

wherein the drive control unit comprises the position control.