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학술지 Characterization of High Power Piezoelectric Energy Scavenging Device based on PMN-PT Piezoelectric Single Crystal
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저자
문승언, 이상균, 이영기, 김광만, 양일석, 양우석, 김종대
발행일
201201
출처
한국물리학회, v.60 no.2, pp.230-234
ISSN
0374-4884
출판사
한국물리학회
DOI
https://dx.doi.org/10.3938/jkps.60.230
협약과제
11MB2100, 스마트and그린 빌딩용 자가충전 지능형 센서노드 플랫폼 핵심기술 개발, 김종대
초록
In this paper, we present the calculations and the results for vibration-energy-scavenging performances based on a piezoelectric single-crystal beam. Using the measured mechanical damping ratio and electro-mechanical coupling coefficient of a novel cantilever structure device, we calculated the output performances and compared them with the measured results. A device based on a bimorph cantilever structure with a proof mass was designed to have a natural resonance frequency of about 60 Hz, and the energy-scavenging capability of piezoelectric single crystal was measured. The results showed that several tens of AC volts and a few milliwatts power were achieved under a 0. 1 g rms vibration condition. Also using this device and a commercial power management circuit, we performed Li-ion battery charging experiment. © 2012 The Korean Physical Society.
키워드
Cantilever, Piezoelectric, Vibration-energy-scavenging
KSP 제안 키워드
60 Hz, Bimorph cantilever, Cantilever structure, Damping ratio, Electro-mechanical coupling coefficient, Energy Scavenging, High power, Li-ion battery charging, Mechanical damping, Natural Resonance Frequency, PMN-PT piezoelectric single crystal