Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Modeling and characterization of capacitor storage circuit for piezoelectric vibration energy harvester

Modeling and characterization of capacitor storage circuit for piezoelectric vibration energy... This paper aims to study a power management circuit for a piezoelectric vibration energy harvester. It presents how to accumulate energy and provide regulated DC voltage for practical applications.Design/methodology/approachEnergy storage and extraction circuit are proposed. While the storage stage consists of a full wave rectifier and a storage capacitor, the extraction stage includes a voltage comparator and regulator, which may provide the load steady DC voltage when the voltage of the storage capacitor is higher than the threshold.FindingsThe numerical analysis and experimental results indicate that it takes a longer time to charge to a specified voltage for the greater storage capacitor and the net charge flowing into the storage capacitor during each period decreases when the voltage of the storage capacitor is higher. The higher threshold voltage of the capacitor has lower harvesting efficiency owing to the rate of charging of the storage capacitor slowing down over time.Research limitations/implicationsBecause of the chosen research method, the power management circuit is only suitable for the piezoelectric vibration energy harvester under resonant conditions.Practical implicationsThis study includes practically useful applications for users to build a power management circuit for piezoelectric energy harvester.Originality/valueThis study presents results that the charging efficiency of the storage circuit is relative to the storage capacitor and the threshold voltage. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Circuit World Emerald Publishing

Modeling and characterization of capacitor storage circuit for piezoelectric vibration energy harvester

Circuit World , Volume 49 (1): 10 – Feb 6, 2023

Loading next page...
 
/lp/emerald-publishing/modeling-and-characterization-of-capacitor-storage-circuit-for-20IwfwNCeD

References (20)

Publisher
Emerald Publishing
Copyright
© Emerald Publishing Limited
ISSN
0305-6120
eISSN
0305-6120
DOI
10.1108/cw-02-2020-0018
Publisher site
See Article on Publisher Site

Abstract

This paper aims to study a power management circuit for a piezoelectric vibration energy harvester. It presents how to accumulate energy and provide regulated DC voltage for practical applications.Design/methodology/approachEnergy storage and extraction circuit are proposed. While the storage stage consists of a full wave rectifier and a storage capacitor, the extraction stage includes a voltage comparator and regulator, which may provide the load steady DC voltage when the voltage of the storage capacitor is higher than the threshold.FindingsThe numerical analysis and experimental results indicate that it takes a longer time to charge to a specified voltage for the greater storage capacitor and the net charge flowing into the storage capacitor during each period decreases when the voltage of the storage capacitor is higher. The higher threshold voltage of the capacitor has lower harvesting efficiency owing to the rate of charging of the storage capacitor slowing down over time.Research limitations/implicationsBecause of the chosen research method, the power management circuit is only suitable for the piezoelectric vibration energy harvester under resonant conditions.Practical implicationsThis study includes practically useful applications for users to build a power management circuit for piezoelectric energy harvester.Originality/valueThis study presents results that the charging efficiency of the storage circuit is relative to the storage capacitor and the threshold voltage.

Journal

Circuit WorldEmerald Publishing

Published: Feb 6, 2023

Keywords: Piezoelectric; Energy harvesting; Capacitor; Storage circuit

There are no references for this article.