Asymmetric SECE Piezoelectric Energy Harvester Under Weak Excitation
- Authors
- Yun, Seong Jin; Kwak, Seung Soo; Lee, Jiseong; Im, Yun Chan; Lee, Sang-Goo; Kim, Yong Sin
- Issue Date
- 2020
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Energy harvesting; piezoelectric devices; low power electronics; the Internet of Things
- Citation
- IEEE ACCESS, v.8, pp.99132 - 99140
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ACCESS
- Volume
- 8
- Start Page
- 99132
- End Page
- 99140
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/58977
- DOI
- 10.1109/ACCESS.2020.2997353
- ISSN
- 2169-3536
- Abstract
- Piezoelectric energy harvesters (PEHs) are widely used to convert energy from a piezoelectric transducer into a stable DC form, which enables low-power IoT devices to have an unlimited operating life without using batteries. Under weak excitation conditions, however, the power-extraction efficiency of conventional PEHs is too low to provide power even to low-power IoT devices that requires low operation voltages less than 2 V. This paper proposes an asymmetric synchronous electric charge extraction (ASECE) scheme that improves the extraction efficiency of PEHs at low output voltages under weak excitation. The proposed ASECE is implemented using 0.18 mu m CMOS technology. The figure-of-merits (FOMs) of the proposed ASECE while operating under 2 V of output voltage are 7.14 and 6.24 at weak and strong excitations, respectively. The maximum FOM for various different excitation levels is observed to be as high as 7.7. The proposed ASECE is superior to prior art with respect to FOM, by at least 1.15 x, 1.63 x, and 2.21 x under 2 V, 1 V, and 0.5 V outputs, respectively, under strong excitation.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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