POWER TAKE-OFF, WAVE ENERGY CONVERTER COMPRISING SUCH POWER TAKE-OFF AND METHOD FOR CONTROLLING SUCH POWER TAKE-OFF

摘要

A power take-off device for use in a wave energy converter comprises a buoy (1) and a means (2, 3) for converting linear motion from the movements of the buoy (1) into rotary motion. By providing at least one flywheel arrangement comprising a flywheel (6) and a transmission means (5; 9) with a stiff connection adapted to engage and disengage the flywheel to and from the means (2, 3) for converting linear motion from the movements of the buoy (1) in relation to the frequency of the wave, in different sea states and wave sizes, to increase power capture by matching the natural frequency with the waves to make the buoy resonate, and also to limit end stop forces by de-tuning the natural frequency in large waves and thereby reduce the amplitude of the buoy motion. A method of controlling a power take-off device is also provided.