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Bandwidth-broadening properties by using a variable width structure in a cantilever-type piezoelectric energy scavenger

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Abstract

In this paper, we present the simulation and the experimental results for vibration-energy-scavenging performances in a cantilever-type piezoelectric energy scavenger with bandwidth broadening properties by using a variable width structure. Using the measured mechanical damping ratio and electro-mechanical coupling coefficient of the fabricated cantilever-type device, we simulated the output performances and designed a cantilever-type piezoelectric energy scavenger with bandwidth broadening characteristics. A device based on a parallel-bimorph cantilever structure with a proof mass, which was designed to have a natural resonance frequency of about 60 Hz, and the energy-scavenging capability of a piezoelectric single crystal was measured and compared them with the simulated results. The results showed that several tens of ac volts and a few milliwatts of power were achieved under a 0.1 g rms vibration condition with a 3 Hz bandwidth.

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Authors and Affiliations

  1. Electronics and Telecommunications Research Institute, Daejeon, 305-700, Korea

    S. E. Moon, W. S. Yang & J. Kim

  2. SFA ENGINEERING R&D Center, Hwaseong, 641-847, Korea

    Y. T. Kim

Authors
  1. S. E. Moon
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  2. W. S. Yang
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  3. J. Kim
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  4. Y. T. Kim
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Correspondence to S. E. Moon.

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Moon, S.E., Yang, W.S., Kim, J. et al. Bandwidth-broadening properties by using a variable width structure in a cantilever-type piezoelectric energy scavenger. Journal of the Korean Physical Society 61, 908–912 (2012). https://doi.org/10.3938/jkps.61.908

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  • DOI: https://doi.org/10.3938/jkps.61.908

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