A WAVE ENERGY ABSORPTION DEVICE, A POWER TAKE-OFF ASSEMBLY AND A WAVE ENERGY SYSTEM.

摘要

A wave energy absorption device comprises a buoy (20) adapted to move with movements of water, and a buoy oscillation device (21; 21c) attached to the buoy (20), the buoy oscillation device comprising an elongated means (210) and a rotary means (211) adapted to interact with the elongated means. A hydraulic pump with variable displacement (24) is connected to the rotary means (211) and connectable to a hydraulic circuit (51, 52). When the buoy (20) moves with movements of water, relative movement is created between the elongated means (210) and the rotary means(211), whereby the hydraulic pump (24) transforms kinetic energy into hydraulic energy which is exported to the hydraulic hose (51), and whereby a torque is applied to the rotary means (211) by the hydraulic pump (24) to dampen or amplify the movements of the buoy (20). When a plurality of buoys are connected to a central hub (10), the buoy oscillation device (21; 21c) provides individual control of the force applied to the buoy by change of displacement in the hydraulic pump (24). A complete power take-off assembly and system with high efficiency and extended control capabilities for a wave energy array with multiple buoys attached with a central hub is provided.