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Maximization of the Output Voltage of a Cantilevered Energy Harvester Comprising Piezoelectric Fiber Composites

압전섬유복합재 외팔보 에너지 회수장치의 출력전압 최대화

  • Kim, Seon-Myeong (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.) ;
  • Kim, Cheol (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
  • 김선명 (경북대학교 기계공학부) ;
  • 김철 (경북대학교 기계공학부)
  • Received : 2011.03.15
  • Accepted : 2011.04.07
  • Published : 2011.07.01

Abstract

In this study, a cantilevered energy harvester comprising piezoelectric fiber and epoxy composites was designed and analyzed electro-mechanically. In order to maximize the power of the cantilevered energy harvester, its exciting frequency was tuned to the first natural frequency of the beam. An efficient analysis method for predicting the output voltage of the beam was developed by using the finite element method coupled with piezoelectric behavior. By using this method, the effects of geometric parameters and various piezoelectric materials on power generation were investigated and the electric characteristics were evaluated. Design optimization of the beam geometries was performed for a base model. The optimum MFC design generated a maximum electric output of 40.1 V at a first natural frequency of 24.5 Hz.

Keywords

Energy Harvester;Piezoelectric Fiber;Voltage;Cantilevered Beam

Acknowledgement

Supported by : 한국연구재단

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