Abstract
In this study, we developed a flexible energy harvester that uses the frequency up-conversion mechanism. The harvester is composed of a flexible piezoelectric cantilever and substrate, and it can scavenge energy from deformation or strain by converting it into a mechanical vibration of the cantilever. We found experimentally that the output voltage of the harvester not affected by an input frequency as long as the strain was large enough, and there was no lower limit of the input frequency. The critical strain, i.e., the threshold radius of curvature of the harvester, could be modulated by adjusting magnetic force; therefore, it is possible to optimally apply the harvester to various deformation ranges. The maximum and average power density at 0.5 Hz of input frequency was measured to be 320 μW/cm 2 and 6.8 μW/cm 2 for a resistive load of 10 MΩ.
| Original language | English |
|---|---|
| Article number | 113904 |
| Journal | Applied Physics Letters |
| Volume | 104 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2014 Mar 17 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
Cite this
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Piezoelectric energy harvester converting strain energy into kinetic energy for extremely low frequency operation. / Kwon, Dae Sung; Ko, Hee Jin; Kim, Min Ook; Oh, Yongkeun; Sim, Jaesam; Lee, Kyounghoon; Cho, Kyung Ho; Kim, Jongbaeg.
In: Applied Physics Letters, Vol. 104, No. 11, 113904, 17.03.2014.Research output: Contribution to journal › Article
TY - JOUR
T1 - Piezoelectric energy harvester converting strain energy into kinetic energy for extremely low frequency operation
AU - Kwon, Dae Sung
AU - Ko, Hee Jin
AU - Kim, Min Ook
AU - Oh, Yongkeun
AU - Sim, Jaesam
AU - Lee, Kyounghoon
AU - Cho, Kyung Ho
AU - Kim, Jongbaeg
PY - 2014/3/17
Y1 - 2014/3/17
N2 - In this study, we developed a flexible energy harvester that uses the frequency up-conversion mechanism. The harvester is composed of a flexible piezoelectric cantilever and substrate, and it can scavenge energy from deformation or strain by converting it into a mechanical vibration of the cantilever. We found experimentally that the output voltage of the harvester not affected by an input frequency as long as the strain was large enough, and there was no lower limit of the input frequency. The critical strain, i.e., the threshold radius of curvature of the harvester, could be modulated by adjusting magnetic force; therefore, it is possible to optimally apply the harvester to various deformation ranges. The maximum and average power density at 0.5 Hz of input frequency was measured to be 320 μW/cm 2 and 6.8 μW/cm 2 for a resistive load of 10 MΩ.
AB - In this study, we developed a flexible energy harvester that uses the frequency up-conversion mechanism. The harvester is composed of a flexible piezoelectric cantilever and substrate, and it can scavenge energy from deformation or strain by converting it into a mechanical vibration of the cantilever. We found experimentally that the output voltage of the harvester not affected by an input frequency as long as the strain was large enough, and there was no lower limit of the input frequency. The critical strain, i.e., the threshold radius of curvature of the harvester, could be modulated by adjusting magnetic force; therefore, it is possible to optimally apply the harvester to various deformation ranges. The maximum and average power density at 0.5 Hz of input frequency was measured to be 320 μW/cm 2 and 6.8 μW/cm 2 for a resistive load of 10 MΩ.
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U2 - 10.1063/1.4869130
DO - 10.1063/1.4869130
M3 - Article
VL - 104
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 11
M1 - 113904
ER -