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http://dx.doi.org/10.5370/KIEEP.2013.62.1.001

The output characteristics of the input waveform to the PZT bimorph vibrator  

Kim, Yong-Hyuk (가천대 공대 전기공학과)
Chu, Soon-Nam (가천대 공대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.62, no.1, 2013 , pp. 1-5 More about this Journal
Abstract
The aim of this study is to research maximum harvesting energy by the optimal input wave condition. The voltage characteristics of the PZT bimorph were investigated in terms of the sine wave, triangle wave and square wave according to frequency range 0~70Hz. It was found that the square wave compared with a triangular wave or square wave was showed the higher output energy. PZT bimorph was mechanically vibrated by solenoid coil experiments, which revealed two voltage peak mode according to frequency. Maximum voltage at second vibration frequency 28Hz demonstrated that the generated DC voltage was proportional to the tip displacement of the bimorph and the phase difference between the input frequency and bimorph vibration frequency was 90 degree. It was expected that optimized design to harvest a much higher energy level from lower frequency vibrations.
Keywords
Triangle wave; Square wave; Energy harvest; Vibration frequency; PZT bimorph; Phase difference;
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