McMahon N.M.,Dundalk Institute of Technology |
McMahon N.M.,Institute for Numerical Computation and Analysis Dublin |
Rogers P.,Dundalk Institute of Technology |
Byrne R.,Dundalk Institute of Technology |
And 2 more authors.
Wind Engineering | Year: 2014
In the 1980s many wind turbines were stall-regulated fixed-pitch machines. The rotors were often equipped with blade-integrated overspeed protection such as ailerons, tip brakes and flip tips. The market for larger small wind turbines is reappearing, and it is conceivable that blade-integrated overspeed control will re-emerge as a solution. Although electrical braking techniques associated with permanent magnet generators are useful, independent rotor-based overspeed control mechanisms are at present still required for fail-safe operation. In this note, we present observations from more than twenty experimental tests. We note that it is possible to effect braking using particular leading-edge profiles.