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Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass

Title
Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass
Authors
Ju S.Ji C.-H.
Ewha Authors
지창현
SCOPUS Author ID
지창현scopus
Issue Date
2015
Journal Title
Journal of Physics: Conference Series
ISSN
1742-6588JCR Link
Citation
vol. 660, no. 1
Publisher
Institute of Physics Publishing
Indexed
SCOPUS scopus
Abstract
This paper presents an impact-based piezoelectric vibration energy harvester using freely movable spherical proof mass and MFC (Macro Fiber Composite) beams as piezoelectric cantilevers. When external vibration is applied, a metal sphere moves freely along the channel and collides with both ends of the cavity, which induces the vibration of parallel- connected MFCs and generates electric power. A proof-of-concept device having the form- factor of a wristwatch has been designed and tested. Moreover, spherical proof mass made of different materials has been tested to analyze the relationship between output power, long-term reliability, and audible noise level during operation. Maximum peak-to-peak open circuit voltage of 41.2V and average power of 908.7 μW have been obtained in response to a 3g vibration at 17Hz for device with parallel-connected MFC beams. © Published under licence by IOP Publishing Ltd.
DOI
10.1088/1742-6596/660/1/012122
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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