Omnidirectional energy harvesting using sandwich-structure YO-YO electromagnetic mechanism in fluid environment

Yunkun Fu, Zhigang Qu, Song Shen, Yang An, Quanpeng Zhang, Gaofeng Wang, Huan Xiang, Mengjiao Yang, Xiaopeng Wang, Ke Zhang, Yingnan Liu, Yu Li, Wuliang Yin, Ying Liu and Xingfei Li

Energy, 2025, vol. 334, issue C

Abstract: The long-term use of rechargeable devices in unattended scenarios presents challenges related to regular battery replacement and maintenance. This is particularly challenging for the ocean current environment. In this paper, a new sandwich-structured YO-YO electromagnetic generator (SYEG) is proposed, which is capable of harvesting energy omnidirectionally in ocean current environment. The unique rotational motion behavior and the electrical characteristics are studied in different postures, and its application potential is investigated. At the optimal posture, with a rotational speed of 2.72 rad/s, the SYEG generates a power of 4.53 W with an average charging current of 110 mA for the Li-ion battery of iPhone 4s (1700mAh). The output power up to 3.132W at flow rate of 0.95 m/s. These findings represent a new method for providing long-term, self-powered energy for rechargeable devices in fluid environments where solar energy has no coverage.

Keywords: Omnidirectional; Current energy harvesting; Electromagnetic generators (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:334:y:2025:i:c:s0360544225033511

DOI: 10.1016/j.energy.2025.137709

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