A Self Bias-flip Piezoelectric Energy Harvester Array without External Energy Reservoirs achieving 488% Improvement with 4-Ratio Switched-PEH DC-DC Converter

Zhen Li, Zhiyuan Chen, Man-Kay Law, Sijun Du, Xu Cheng, Xiaoyang Zeng, Jun Han

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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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 languageEnglish
Title of host publicationProceedings of the 2023 IEEE Custom Integrated Circuits Conference (CICC)
Place of PublicationPiscataway
PublisherIEEE
Pages1-2
Number of pages2
ISBN (Electronic)979-8-3503-9948-6
ISBN (Print)979-8-3503-9949-3
DOIs
Publication statusPublished - 2023
Event2023 IEEE Custom Integrated Circuits Conference (CICC) - San Antonio, United States
Duration: 23 Apr 202326 Apr 2023

Conference

Conference2023 IEEE Custom Integrated Circuits Conference (CICC)
Country/TerritoryUnited States
City San Antonio
Period23/04/2326/04/23

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-care
Otherwise 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

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