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A pendulum-plucked rotor for efficient exploitation of ultralow-frequency mechanical energy

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  • Fan, Kangqi
  • Wang, Chenyu
  • Chen, Chenggen
  • Zhang, Yan
  • Wang, Peihong
  • Wang, Fei

Abstract

Harvesting the pervasive ultralow-frequency (<5 Hz) mechanical energy has been considered as a promising strategy to implement decentralized power sources for the sharply increasing number of low-power electronics, but the low output power impedes the practical application of ultralow-frequency energy harvesting technologies. To address this issue, this paper reports a pendulum-plucked rotor that can transform ultralow-frequency excitations (vibrations and swings) to uni-directional and rapid rotation. This transformation is enabled by an innovative inclined two-layered plectrum, which provides both sufficiently large driving stiffness and low friction resistance. Owing to the uni-directional and rapid rotation, an energy harvester realized with the pendulum-plucked rotor achieves 7.6 mW and 1.25 mW output power under ultralow-frequency swings and vibrations, respectively, which are approximately an order of magnitude higher than those (0.2 mW and 0.15 mW) generated by the conventional swing-based energy harvester under the same conditions. Moreover, the fabricated harvester can capture sufficient human biomechanical energy for powering a wireless temperature sensor and a wireless door bell. This study demonstrates the promising potential of the pendulum-plucked rotor in harnessing the ultralow-frequency mechanical energy as the decentralized power sources.

Suggested Citation

  • Fan, Kangqi & Wang, Chenyu & Chen, Chenggen & Zhang, Yan & Wang, Peihong & Wang, Fei, 2021. "A pendulum-plucked rotor for efficient exploitation of ultralow-frequency mechanical energy," Renewable Energy, Elsevier, vol. 179(C), pages 339-350.
    • Handle: RePEc:eee:renene:v:179:y:2021:i:c:p:339-350
    DOI: 10.1016/j.renene.2021.06.139
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    References listed on IDEAS

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    Cited by:

    1. Fang, Shitong & Chen, Keyu & Lai, Zhihui & Zhou, Shengxi & Liao, Wei-Hsin, 2023. "Analysis and experiment of auxetic centrifugal softening impact energy harvesting from ultra-low-frequency rotational excitations," Applied Energy, Elsevier, vol. 331(C).
    2. Jiatong Chen & Bin Bao & Jinlong Liu & Yufei Wu & Quan Wang, 2022. "Pendulum Energy Harvesters: A Review," Energies, MDPI, vol. 15(22), pages 1-26, November.
    3. Li, Rongchun & Fan, Kangqi & Ma, Xiaoyu & Wen, Tao & Liu, Qingli & Gao, Xianming & Zhu, Jiuling & Zhang, Yan, 2023. "A rotational energy harvester with a semi-flexible one-way clutch for capturing low-frequency vibration energy," Energy, Elsevier, vol. 281(C).
    4. Fan, Kangqi & Wang, Chenyu & Zhang, Yan & Guo, Jiyuan & Li, Rongchun & Wang, Fei & Tan, Qinxue, 2023. "Modeling and experimental verification of a pendulum-based low-frequency vibration energy harvester," Renewable Energy, Elsevier, vol. 211(C), pages 100-111.

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