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27.3 A Piezoelectric Energy-Harvesting Interface Using Split Phase Flipping-Capacitor Rectifier and Capacitor Reuse Multiple-VCR SC DC-DC Achieving 9.3× Energy Extraction Improvement
Zhiyuan Chen1,2; Yang Jiang1; Man-Kay Law1; Pui-In Mak1; Xiaoyang Zeng2; Rui P. Martins1,3
2019-02
Conference Name2019 IEEE International Solid- State Circuits Conference - (ISSCC)
Source Publication2019 IEEE International Solid- State Circuits Conference - (ISSCC)
Conference Date17-21 Feb. 2019
Conference PlaceSan Francisco, CA, USA, USA
Abstract

Piezoelectric energy harvesters (PEH) exhibit promising features to scavenge the ambient vibration energy for ubiquitous miniaturized internet of things (IoT) devices. For the traditional PEH using a full-bridge rectifier (FBR), the inherent capacitance (C P ) limits the extractable AC-DC electrical power. By extending the damping duration, PEH interfaces employing non-linear techniques, such as the parallel-synchronized-switch harvesting-on-inductor (P-SSHI) [1], can increase the harvestable energy. However, they typically require bulky external high-Q inductors to enhance the extracted power. Recently, various inductor-less PEH interfaces exploiting only capacitors for flipping the PEH voltage during the zero-crossing of the PEH current (I P ) have been reported [2–4]. However, their achievable energy extraction improvement depends highly on the number of flipping phases. This work proposes a split-phase flipping-capacitor rectifier (SPFCR) implementation entailing only 4 capacitors, while achieving the highest number of phases (21) when compared to prior art [2–4]. To resolve the lack of input power (P in ) adaptability in [2–4], this work proposes a capacitor-reuse multiple voltage-conversion-ratio (VCR) switched-capacitor (SC) DC-DC converter to reduce the charge redistribution loss. Maximum power point tracking (MPPT) is also accomplished using the fractional FBR open circuit voltage (V OC,FBR ) for relaxed voltage tolerance, while raising the PEH extracted energy. This work demonstrates a measured 9.3× energy-extraction improvement when compared to a conventional FBR interface.

DOI10.1109/ISSCC.2019.8662323
Language英语
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Document TypeConference paper
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.University of Macau, Macau, China
2.Fudan University, Shanghai, China
3.Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zhiyuan Chen,Yang Jiang,Man-Kay Law,et al. 27.3 A Piezoelectric Energy-Harvesting Interface Using Split Phase Flipping-Capacitor Rectifier and Capacitor Reuse Multiple-VCR SC DC-DC Achieving 9.3× Energy Extraction Improvement[C],2019.
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