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Piezoelectric vibration energy harvesting: A connection configuration scheme to increase operational range and output power

Du, Sijun
; 
Jia, Yu
; 
Seshia, Ashwin A.
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Affiliation
University of Cambridge; University of Chester
EPub Date
Publication Date
2016-12-12
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Mechanical Engineering
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Abstract
For a conventional monolithic piezoelectric transducer (PT) using a full-bridge rectifier, there is a threshold voltage that the open-circuit voltage measured across the PT must attain prior to any transfer of energy to the storage capacitor at the output of the rectifier. This threshold voltage usually depends on the voltage of the storage capacitor and the forward voltage drop of diodes. This article presents a scheme of splitting the electrode of a monolithic piezoelectric vibration energy harvester into multiple (n) equal regions connected in series in order to provide a wider operating voltage range and higher output power while using a full-bridge rectifier as the interface circuit. The performance of different series stage numbers has been theoretically studied and experimentally validated. The number of series stages (n≥1n≥1) can be predefined for a particular implementation, which depends on the specified operating conditions, to achieve optimal performance. This enables the system to attain comparable performance compared to active interface circuits under an increased input range while no additional active circuits are required and the system is comparatively less affected by synchronized switching damping effect.
Citation
Du, S., Jia, Y., & Seshia, A. A. (2016). Piezoelectric vibration energy harvesting: A connection configuration scheme to increase operational range and output power. Journal of Intelligent Material Systems and Structures, 28(14), 1905-1915. DOI: 10.1177/1045389X16682846
Publisher
SAGE Publications
Journal
Journal of Intelligent Material Systems and Structures
Research Unit
URI
http://hdl.handle.net/10034/620357
DOI
10.1177/1045389X16682846
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PubMed Central ID
Type
Article
Language
en
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ISSN
EISSN
1530-8138
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http://journals.sagepub.com/doi/abs/10.1177/1045389X16682846