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A New Electrode Design Method in Piezoelectric Vibration Energy Harvesters to Maximize Output Power
Du, Sijun Jia, Yu Chen, Shao-Tuan Zhao, Chun Sun, Boqian Arroyo, Emmanuelle Seshia, Ashwin A.
Du, Sijun
Jia, Yu
Chen, Shao-Tuan
Zhao, Chun
Sun, Boqian
Arroyo, Emmanuelle
Seshia, Ashwin A.
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EPub Date
Publication Date
2017-07-19
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Abstract
A resonant vibration energy harvester typically comprises of a clamped anchor and a vibrating shuttle with a proof mass. Piezoelectric materials are embedded in locations of high strain in order to transduce mechanical deformation into electrical charge. Conventional design for piezoelectric vibration energy harvesters (PVEH) usually utilizes piezoelectric materials and metal electrode layers covering the entire surface area of the cantilever with no consideration provided to examine the trade-off involved with respect to maximize output power. This paper reports on the theory and experimental verification underpinning optimization of the active electrode area in order to maximize output power. The calculations show that, in order to maximize the output power of a PVEH, the electrode should cover the piezoelectric layer from the peak strain area to a position, where the strain is a half of the average strain in all the previously covered area. With the proposed electrode design, the output power can be improved by 145% and 126% for a cantilever and a clamped-clamped beam, respectively. MEMS piezoelectric harvesters are fabricated to experimentally validate the theory.
Citation
Du, S., Jia, Y., Chen, S.T., Zhao, C., Sun, B., Arroyo, E., & Seshia, A.A. (2017). A New Electrode Design Method in Piezoelectric Vibration Energy Harvesters to Maximize Output Power. Sensors and Actuators A: Physical, 263(15), 693-701
Publisher
Elsevier
Journal
Sensors and Actuators A: Physical
Research Unit
DOI
10.1016/j.sna.2017.06.026
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
0924-4247