DocumentCode :
3285936
Title :
Design and optimization of secondary shock type piezoelectric system
Author :
Jung, Hyun Jun ; Baek, Ki Hwan ; Hidaka, Sinichi ; Song, Daniel ; Se Bin Kim ; Sung, Tae Hyun
Author_Institution :
Hanyang Univ., Seoul, South Korea
fYear :
2012
fDate :
9-13 July 2012
Firstpage :
1
Lastpage :
4
Abstract :
Two models for energy harvesting system imparting rotational energy to piezoelectric materials are presented in order to compare the effects of applying identical amounts of energy to a cantilever beam by strain-changing and shock application. For a piezoelectric system given a high impulse with low displacement, higher power outputs were generated at lower resistive loads. Conversely, for a system with high displacement at a low impulse, power output was higher at high resistive loads. At matched impedance, the secondary shock system generated higher power output than the hitting system did at low resistive load. Optimized response of secondary shock system was obtained at a frequency of 60 Hz with a low resistive load of 1 k Ω. The generated output power was measured 124 mW, which corresponds to power density of 140 mW/cm3 for entire cantilever beam and power density of 342 mW/cm3 for only piezoelectric material volume. For a system without a secondary impulse at low resistive loads (1 k Ω), the optimizing frequency was between 20 and 30 Hz, with an output power of 22 mW, which corresponds to a 25 mW/cm3 power density for entire cantilever beam and power density of 60 mW/ cm3 for only piezoelectric material volume.
Keywords :
beams (structures); cantilevers; energy harvesting; piezoelectric materials; piezoelectric transducers; cantilever beam; energy harvesting system; frequency 60 Hz; hitting system; matched impedance; piezoelectric materials; power 124 mW; power 22 mW; power density; resistance 1 kohm; resistive load; response optimization; rotational energy; secondary shock-type piezoelectric system; strain-changing application; Electric shock; Energy harvesting; Frequency measurement; Piezoelectric materials; Strain; Structural beams; Vibrations; piezoelectric; secondary; shock;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Conference_Location :
Aveiro
Print_ISBN :
978-1-4673-2668-1
Type :
conf
DOI :
10.1109/ISAF.2012.6297761
Filename :
6297761
Link To Document :
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