Effects of Thickness Ratio in Piezoelectric/Elastic Cantilever Structure on the Piezoelectric Energy Harvesting Performance

Ga-Yeon Kim; Mahesh Peddigari; Kyung-Won Lim; Geon-Tae Hwang; Woon-Ha Yoon; HongSoo Choi; 이정우; 류정호

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자료유형: 학술저널

저자정보: Ga-Yeon Kim (Pusan National University) Mahesh Peddigari (Korea Institute of Materials Science (KIMS)) Kyung-Won Lim (Korea Institute of Materials Science (KIMS)) Geon-Tae Hwang (Korea Institute of Materials Science (KIMS)) Woon-Ha Yoon (Korea Institute of Materials Science (KIMS)) HongSoo Choi (DGIST) 이정우 (부산대학교) 류정호 (영남대학교)

저널정보: 대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.15 No.1

발행연도: 2019.1

수록면: 61 - 69 (9page)

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The energy harvesting by utilizing the piezoelectric eff ect for the conversion of oscillatory mechanical energy to usefulelectrical energy has been promising for self-powered devices. The output power can be controlled by designing the sizeand shape of the constituents of the harvester. This study demonstrates the eff ect of Ti plate (elastic layer) thickness on theresonant frequency, neutral axis position, vibration amplitude and energy harvesting performance of the cantilever structuredpiezoelectric energy harvester (PEH). Here, the each harvester had the same dimensions of piezoelectric layer and the sameproof mass position at the end of the cantilever while it had the diff erent elastic layer thicknesses (70–300 μm). The analysisrevealed that the output power showed the opposite trend in vibration amplitude with varying the elastic layer thickness. Among all of the PEHs, the confi guration with the largest elastic layer thickness (300 μm) exhibited a maximum output powerof 48 μW at 76 Hz under 0.2 g acceleration, despite of the smallest vibration amplitude and the highest resonant frequency. The outcomes suggest that the thickness ratio of the piezoelectric and elastic layers should be optimized to realize the bestharvesting performance.

#Energy harvesting #Piezoelectric eff ect #Neutral axis #Cantilever #Thickness ratio

참고문헌 (28)

참고문헌 신청

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Iannacci, J. / 2016 / The MEMS fourleaf clover wideband vibration energy harvesting device: design concept and experimental verifi cation / Microsyst. Technol 22:1865

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