Journal of the Korean Physical Society

, Volume 60, Issue 2, pp 230–234

Characterization of a high-power piezoelectric energy-scavenging device based on PMN-PT piezoelectric single crystals

Authors

    • Electronics and Telecommunications Research Institute
  • S. -K. Lee
    • Electronics and Telecommunications Research Institute
  • Y. -G. Lee
    • Electronics and Telecommunications Research Institute
  • K. M. Kim
    • Electronics and Telecommunications Research Institute
  • Y. -S. Yang
    • Electronics and Telecommunications Research Institute
  • W. S. Yang
    • Electronics and Telecommunications Research Institute
  • J. Kim
    • Electronics and Telecommunications Research Institute
Article

DOI: 10.3938/jkps.60.230

Cite this article as:
Moon, S.E., Lee, S.-., Lee, Y.-. et al. Journal of the Korean Physical Society (2012) 60: 230. doi:10.3938/jkps.60.230

Abstract

In this paper, we present the calculations and the results for vibration-energy-scavenging performances based on a piezoelectric single-crystal beam. Using the measured mechanical damping ratio and electro-mechanical coupling coefficient of a novel cantilever structure device, we calculated the output performances and compared them with the measured results. A device based on a bimorph cantilever structure with a proof mass was designed to have a natural resonance frequency of about 60 Hz, and the energy-scavenging capability of piezoelectric single crystal was measured. The results showed that several tens of AC volts and a few milliwatts power were achieved under a 0.1 g rms vibration condition. Also using this device and a commercial power management circuit, we performed Li-ion battery charging experiment.

Keywords

Vibration-energy-scavenging Piezoelectric Cantilever

Copyright information

© The Korean Physical Society 2012