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Apparatus for rotating the nacelle of a wind turbine

  • US 9,359,995 B2
  • Filed: 11/16/2011
  • Issued: 06/07/2016
  • Est. Priority Date: 12/10/2010
  • Status: Active Grant
First Claim
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1. 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 in standstill operation, 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 an overall moment generated by the azimuth motors in tracking operation, wherein the control device, in tracking operation, actuates a number m of the 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.

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