세라미스트 (Ceramist)

  • 제22권1호
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  • Pages.56-69
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  • 2019
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  • 1226-976X(pISSN)
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  • 2586-0631(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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광대역 압전 에너지 하베스팅 기술

Broadband Piezoelectric Energy Harvesting Technology

  • 이동규 (고려대학교 신소재공학과) ;
  • 이연정 (KU-KIST 융합대학원) ;
  • 송현철 (한국과학기술연구원 전자재료연구단)
  • Lee, Dong-Gyu (Material Science and Engineering, Korea University) ;
  • Yee, Yeon-Jeong (KU-KIST Graduate School of Converging Science and Technology, Korea University) ;
  • Song, Hyun-Cheol (Center for Electronic Materials, Korea Institute of Science and Technology)
  • 투고 : 2019.02.21
  • 심사 : 2019.03.05
  • 발행 : 2019.03.30
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초록

Recent advances in low-power sensors and transmitters are driving the search for standalone power sources that utilize unused ambient energy. These energy harvesters can alleviate the issues related to the installation and maintenance of sensors. Particularly piezoelectric energy harvesters, with the ability to convert ambient mechanical energy into useful electricity, have received significant attention due to their high energy density, low cost and operational stability over wide temperature and pressure conditions. In order to maximize the generated electrical power, the natural frequency of the piezoelectric energy harvester should be matched with the dominant frequency of ambient vibrations. However, piezoelectric energy harvesters typically exhibit a narrow bandwidth, thus, it becomes difficult to operate near resonance under broadband ambient vibration conditions. Therefore, the resonating of energy harvesters is critical to generate maximum output power under ambient vibration conditions. For this, energy harvesters should have broadband natural frequency or actively tunable natural frequency with ambient vibrations. Here, we review the most plausible broadband energy harvesting techniques of the multi-resonance, nonlinearity, and self-resonance tuning. The operation mechanisms and recent representative studies of each technique are introduced and the advantages and disadvantages of each method are discussed. In addition, we look into the future research direction for the broadband energy harvester.

키워드

참고문헌

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피인용 문헌

  1. Ultrasound Mediated Wireless Power Transfer Technology vol.24, pp.3, 2019, https://doi.org/10.31613/ceramist.2021.24.3.05