Self-powered synchronous asymmetric voltage flip and charge extraction technique for piezoelectric energy harvesting-Reference-Cited by-同舟云学术

Self-powered synchronous asymmetric voltage flip and charge extraction technique for piezoelectric energy harvesting

Published:2024-06-19 Issue: Volume: Page:
ISSN:0171-8096
Container-title:tm - Technisches Messen
language:en
Short-container-title:

Author:

Xiao Zekun¹,Dong Weijie¹,Xie Yongping²,Zhang Jiahao¹^ORCID,Wei Yunyang¹,Wang Xu¹

Affiliation:

1. School of Electrical Engineering , 12399 Dalian University of Technology , Dalian 116024 , China

2. School of Information and Communication Engineering , 12399 Dalian University of Technology , Dalian 116024 , China

Abstract

Abstract This paper presents a nonlinear interface circuit for piezoelectric vibration energy harvester (PEH) with Synchronous Asymmetric Voltage Flipping and Charge Extraction process, denoted as SAFCE. SAFCE flips the PEH voltage polarity at positive peak and completely extracting charge at negative peak through LC resonance. The harvested power is independent of load. In theory, the harvested power is 200 % of SECE and 780 % of best impedance-matched SEH due to the energy injection mechanism, which enhances the electromechanical coupling coefficient of PEH. Moreover, a self-powered SAFCE circuit without rectifier bridge is designed, which reduces power consumption and eliminates the need for external power sources. Experimental measurements are carried out to compare with SEH and SECE circuits under the condition of either constant displacement magnitude (0.5 mm) or constant external excitation acceleration (10 m/s2). The experimental results indicate that the power harvested by the SAFCE technique increased by 171 % compared with the SECE method and by 381 % compared with the best impedance-matched SEH method under the same conditions.

Funder

National Key Research and Development Program of China

Publisher

Walter de Gruyter GmbH

Link

https://www.degruyter.com/document/doi/10.1515/teme-2023-0171/pdf

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