Articles | Volume 3, issue 1
Wind Energ. Sci., 3, 97–105, 2018
https://doi.org/10.5194/wes-3-97-2018
Wind Energ. Sci., 3, 97–105, 2018
https://doi.org/10.5194/wes-3-97-2018

Research article 14 Mar 2018

Research article | 14 Mar 2018

Friction torque of wind-turbine pitch bearings – comparison of experimental results with available models

Matthias Stammler et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (05 Nov 2017) by Lars Pilgaard Mikkelsen
AR by Matthias Stammler on behalf of the Authors (06 Dec 2017)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (21 Dec 2017) by Lars Pilgaard Mikkelsen
RR by Anonymous Referee #1 (17 Jan 2018)
ED: Publish subject to minor revisions (review by editor) (17 Jan 2018) by Lars Pilgaard Mikkelsen
AR by Matthias Stammler on behalf of the Authors (29 Jan 2018)  Author's response    Manuscript
ED: Publish subject to minor revisions (review by editor) (08 Feb 2018) by Lars Pilgaard Mikkelsen
ED: Publish as is (12 Feb 2018) by Lars Pilgaard Mikkelsen
ED: Publish as is (13 Feb 2018) by Jakob Mann(Chief Editor)
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Short summary
Modern wind turbines all share the ability to turn (pitch) the blades around their main axis. By pitching the blades, the aerodynamic forces created by the blades are controlled. Rolling bearings, consisting of two steel rings and balls that roll on raceways between them, are used to allow pitching. To design pitch drives, it is necessary to know the losses within the bearings. This article describes how such losses have been measured and compares them with calculation models.