Harvesting energy from ship rolling using an eccentric disk revolving in a hula-hoop motion

This research developed an eccentric disk and novel circular Halbach array to harvest wave energy from the rolling motion of a ship. The designed eccentric disk revolves in a motion that mimics a hula-hoop at higher angular speeds than eccentric disks oscillate normally having. The produced kinetic energy was converted into electrical energy through electromagnetic induction. To enhance electromagnetic efficiency, this study presents a novel circular Halbach array. The wave energy harvesting device, composed of the eccentric disk and the circular Halbach array, was mounted in a ship's cabin. The simulated power output of the eccentric disk was approximately 2.34 W. The proposed energy harvester can serve as a back-up power source during emergencies.