Journal of the Korean Physical Society

, Volume 61, Issue 6, pp 908–912

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

Article

DOI: 10.3938/jkps.61.908

Cite this article as:
Moon, S.E., Yang, W.S., Kim, J. et al. Journal of the Korean Physical Society (2012) 61: 908. doi:10.3938/jkps.61.908

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 grms vibration condition with a 3 Hz bandwidth.

Keywords

Vibration-energy-scavengingPiezoelectricCantileverBandwidth

Copyright information

© The Korean Physical Society 2012

Authors and Affiliations

  1. 1.Electronics and Telecommunications Research InstituteDaejeonKorea
  2. 2.SFA ENGINEERING R&D CenterHwaseongKorea