Whisk-inspired Motion Converter for Ocean Wave Energy Harvesting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1808-1811
Number of pages4
Journal / PublicationIEEE/ASME Transactions on Mechatronics
Issue number3
Online published1 Jul 2021
Publication statusPublished - Jun 2022


Inspired by hand push whisk blenders that are widely used in the kitchen, we here propose an energy harvester that enables conversion of low-frequency translational vibration to high-speed rotations and further generates electricity via the electromagnetic effect. The whisk-inspired energy harvester (W-EH) is composed of an internal thread sleeve, an external thread driving shaft, a spring, and a buoy. Compared with transmission approaches used by electromagnetic power generators, the proposed design has the superiority of low cost, ultra-low operation frequency (lower than 1 Hz), and high-power output. Tests in water indicate that the normalized power density is 300% higher than the state of the art. Excited by mimicking ocean waves at 1.5 Hz, the W-EH prototype generates a maximum power of 64.4 mW and succeeds in lighting up 115 LEDs simultaneously, whose power is enough for continuous operations of most wireless sensors.

Research Area(s)

  • Coils, electromagnetic, Electromagnetics, Energy harvesting, frequency up conversion, Mathematical model, ocean wave, Ocean waves, Resistance, Shafts, Springs