Asymmetric SECE Piezoelectric Energy Harvester Under Weak Excitation
| Autor: | Seung Soo Kwak, Sang Goo Lee, Yong Sin Kim, Jiseong Lee, Seong Jin Yun, Yun Chan Im |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
General Computer Science Energy harvesting business.industry 020208 electrical & electronic engineering General Engineering 020206 networking & telecommunications 02 engineering and technology Piezoelectricity the~Internet of Things Power (physics) CMOS Low-power electronics 0202 electrical engineering electronic engineering information engineering Optoelectronics General Materials Science lcsh:Electrical engineering. Electronics. Nuclear engineering low power electronics business lcsh:TK1-9971 piezoelectric devices Excitation Energy (signal processing) Voltage |
| Zdroj: | IEEE Access, Vol 8, Pp 99132-99140 (2020) |
| ISSN: | 2169-3536 |
| Popis: | 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 μm 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×, 1.63×, and 2.21× under 2 V, 1 V, and 0.5 V outputs, respectively, under strong excitation. |
| Databáze: | OpenAIRE |
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