Abstract: A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.

Abstract: A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.

Abstract: Medium voltage electric rotary joint for energy conduction between the rotating nacelle 1 and the static tower 2 of a wind turbine generator comprising a pivoted and ball-bearing mounted 5 upper housing 6 and a fixed lower housing 7; mounted coaxially on a centre shaft 8; brushes 9 and springs 10 located within an insulator epoxy 11 inside the upper housing 6 and equivalent copper rings 12 located within an insulator epoxy 11 inside the lower housing 7; cable connector plugs 13 attached to mountable insulated bushings 14, a protective booth 15, seals 16 and upper and lower cable supports 17,18.