Abstract
With the advent of the lnternet-of-Things (1oT) era, sensor nodes are required in almost all fields to achieve a better interaction between humans and the environment. Piezoelectric energy harvester (PEH), which exhibits an equivalent electrical model of an AC current source /P in parallel with the inherent capacitor CP, is a promising technology to resolve the energy problem of such sensor nodes. Recently, inductor-based rectifiers, capacitor-based rectifiers and hybrid rectifiers have been proposed to improve the energy extraction efficiency of PEH devices [1]–[5]. However, these structures all require the aid of additional capacitors or inductors to achieve bias-flip operation, as illustrated in Fig. 1. These extra passive devices are typically large, which can be a major bottleneck in system-volumeconstrained applications such as MEMS [4]. In response to the above problem, this work proposes a novel 8-phase self bias-flip PEH interface with charge recycling and reusing (SBFRR). By using the C P of 4 PEHs as flipping capacitors, this scheme achieves a high voltage flipping efficiency without using extra energy reservoirs. The 4 C P can also serve as flying capacitors to achieve switched-PEH DC-DC (SPDC) conversion for MPPT, while maintaining a MOPIR of >3.5× with a PEH input voltage (Vp) from 0. 78Vto4.9V.
Original language | English |
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Title of host publication | Proceedings of the 2023 IEEE Custom Integrated Circuits Conference (CICC) |
Place of Publication | Piscataway |
Publisher | IEEE |
Pages | 1-2 |
Number of pages | 2 |
ISBN (Electronic) | 979-8-3503-9948-6 |
ISBN (Print) | 979-8-3503-9949-3 |
DOIs | |
Publication status | Published - 2023 |
Event | 2023 IEEE Custom Integrated Circuits Conference (CICC) - San Antonio, United States Duration: 23 Apr 2023 → 26 Apr 2023 |
Conference
Conference | 2023 IEEE Custom Integrated Circuits Conference (CICC) |
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Country/Territory | United States |
City | San Antonio |
Period | 23/04/23 → 26/04/23 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- Micromechanical devices
- Capacitors
- Rectifiers
- Voltage
- Switches
- High-voltage techniques
- Reservoirs