Apparatus for rotating the nacelle of a wind turbine

An apparatus for the controlled rotation of a nacelle of a wind turbine, having a control device and having a plurality of azimuth motors, wherein the apparatus furthermore has a plurality, amounting to n in number, of yaw brakes, wherein the control device is configured for standstill operation and for tracking operation, wherein in standstill operation, the n yaw brakes are actuated so as to impart a standstill holding moment M1 for holding the nacelle, wherein here, the n yaw brakes impart in each case a substantially equal first holding moment, and wherein in tracking operation, the n yaw brakes are actuated so as to impart a tracking holding moment M2, wherein the tracking holding moment M2 is lower than the standstill holding moment M1 (M1>M2), and also lower than the overall moment generated by the azimuth motors in tracking operation, wherein the control device, in tracking operation, actuates a number m of n yaw brakes in each case so as to generate substantially the same constant holding moment M3, wherein M1/n>M3>M2/n, and wherein the other (n−m) yaw brakes are actuated in each case so as to generate substantially the same constant holding moment M4, wherein m*M3+(n−m)*M4˜=M2 and M1/n>M2/n>M4.