Equivalent circuit modeling of piezoelectric energy harvesters

Yaowen Yang*, Lihua Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

265 Citations (Scopus)

Abstract

Last decade has seen growing research interest in vibration energy harvesting using piezoelectric materials. When developing piezoelectric energy harvesting systems, it is advantageous to establish certain analytical or numerical model to predict the system performance. In the last few years, researchers from mechanical engineering established distributed models for energy harvester but simplified the energy harvesting circuit in the analytical derivation. While, researchers from electrical engineering concerned the modeling of practical energy harvesting circuit but tended to simplify the structural and mechanical conditions. The challenges for accurate modeling of such electromechanical coupling systems remain when complicated mechanical conditions and practical energy harvesting circuit are considered in system design. In this article, the aforementioned problem is addressed by employing an equivalent circuit model, which bridges structural modeling and electrical simulation. First, the parameters in the equivalent circuit model are identified from theoretical analysis and finite element analysis for simple and complex structures, respectively. Subsequently, the equivalent circuit model considering multiple modes of the system is established and simulated in the SPICE software. Two validation examples are given to verify the accuracy of the proposed method, and one further example illustrates its capability of dealing with complicated structures and non-linear circuits.

Original languageEnglish
Pages (from-to)2223-2235
Number of pages13
JournalJournal of Intelligent Material Systems and Structures
Volume20
Issue number18
DOIs
Publication statusPublished - Dec 2009
Externally publishedYes

ASJC Scopus Subject Areas

  • General Materials Science
  • Mechanical Engineering

Keywords

  • Energy harvesting
  • Equivalent circuit model
  • Finite element analysis
  • Piezoelectric materials

Fingerprint

Dive into the research topics of 'Equivalent circuit modeling of piezoelectric energy harvesters'. Together they form a unique fingerprint.

Cite this