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Improved Interface Circuit for Enhancing the Power Output of a Vibration-Threshold-Triggered Piezoelectric Energy Harvester

Author

Listed:
  • Jiqiang Liu

    (School of Electronics and Information, Soochow University, Suzhou 215006, China)

  • Junjie Yang

    (School of Electronics and Information, Soochow University, Suzhou 215006, China)

  • Ruofeng Han

    (Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)

  • Qisheng He

    (Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)

  • Dacheng Xu

    (School of Electronics and Information, Soochow University, Suzhou 215006, China)

  • Xinxin Li

    (Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)

Abstract

The vibration-threshold-triggered piezoelectric energy harvester is a new type of piezoelectric energy harvester with a two-stage structure, which can generate electricity in a low frequency environment and recognize vibration intensity at the same time. In this study, a theoretical model of a vibration-threshold-triggered energy harvester was examined, and an equivalent circuit model of the energy harvester was obtained. Then, an interface circuit was proposed that can significantly improve the output power of the energy harvester. The interface circuit achieved impedance matching with the piezoelectric material to maximize the energy collected from the energy harvester. First, we calculated and analyzed the impedance characteristics of the energy harvester, based on the equivalent circuit model. It was found that because the piezoelectric material is in resonance as the energy harvester is in operation, the corresponding impedance is almost resistance. Therefore, a resistance-matching strategy was proposed. Last, we proposed an interface circuit with adjustable input impedance to achieve resistance matching. The experimental results show that the proposed interface circuit can increase the output power of the energy harvester by 48.1–55.7% over that achieved with the standard interface circuit.

Suggested Citation

  • Jiqiang Liu & Junjie Yang & Ruofeng Han & Qisheng He & Dacheng Xu & Xinxin Li, 2020. "Improved Interface Circuit for Enhancing the Power Output of a Vibration-Threshold-Triggered Piezoelectric Energy Harvester," Energies, MDPI, vol. 13(15), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3830-:d:389851
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    References listed on IDEAS

    as
    1. Zhang, Jinhui & Qin, Lifeng, 2019. "A tunable frequency up-conversion wideband piezoelectric vibration energy harvester for low-frequency variable environment using a novel impact- and rope-driven hybrid mechanism," Applied Energy, Elsevier, vol. 240(C), pages 26-34.
    2. Wang, Hao & Jasim, Abbas & Chen, Xiaodan, 2018. "Energy harvesting technologies in roadway and bridge for different applications – A comprehensive review," Applied Energy, Elsevier, vol. 212(C), pages 1083-1094.
    3. Ju, Suna & Ji, Chang-Hyeon, 2018. "Impact-based piezoelectric vibration energy harvester," Applied Energy, Elsevier, vol. 214(C), pages 139-151.
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