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Impedance Matching Techniques of Multi-layered PZT Ceramics for Piezoelectric Energy Harvesters

Authors
Cho, Kyung HoShin, Dong-JinLee, Chang SooKoh, Jung-Hyuk
Issue Date
Jul-2019
Publisher
KOREAN INST METALS MATERIALS
Keywords
Piezoelectric energy harvesters; Impedance matching; PZT
Citation
ELECTRONIC MATERIALS LETTERS, v.15, no.4, pp 437 - 443
Pages
7
Journal Title
ELECTRONIC MATERIALS LETTERS
Volume
15
Number
4
Start Page
437
End Page
443
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/32708
DOI
10.1007/s13391-019-00135-w
ISSN
1738-8090
2093-6788
Abstract
In this research, the possibility of passive damping system based on the piezoelectric energy harvesting has been proposed and tested. To apply passive damper system, piezoelectric ceramics were stacked, and impedance was matched. Piezoelectric energy harvesters were employed due to their excellent piezoelectric and robust properties. Especially, multilayered (Pb,Zr)TiO3 piezoelectric ceramic have high piezoelectric charge coefficient d(33) and piezoelectric voltage coefficient g(33) for actuator and harvester applications, respectively. Multilayered (Pb,Zr)TiO3 piezoelectric ceramics can generate comparatively high current level compared with single layered piezoelectric ceramics due to its parallel connected capacitors. In energy harvester applications, multilayered (Pb,Zr)TiO3 piezoelectric ceramics have a role of voltage source with capacitive impedance. Due to considerable impedance in voltage sources, the role of impedance matching between the source and output terminal is more critical. By employing the piezoelectric energy harvesting system for the passive damper, output energy of 11J/cm(3) was obtained at the 100F capacitors. Therefore, impedance matching technologies were intensively investigated to obtain maximum output energy for storing capacitors. [GRAPHICS] .
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Koh, Jung Hyuk
대학원 (지능형에너지산업융합학과)
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