Electromechanical Model of a Longitudinal Mode Piezoelectric Transformer

This paper presents an electromechanical model for a piezoelectric transformer (PT), which is driven at the longitudinal mode. The electromechanical model is established by the coupled equations of motion of the PT, which is derived by the Rayleigh-Ritz method and Hamilton's principle. The Rayl...

Full description

Saved in:
Bibliographic Details
Published in2007 7th International Conference on Power Electronics and Drive Systems pp. 267 - 272
Main Author Shine-Tzong Ho
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2007
Subjects
Admittance
Continuous time systems
Electric variables
Electromechanical model
Equations
Equivalent circuit
Equivalent circuits
Longitudinal mode
Parameter estimation
Piezoelectric transformer
Power generation
Power system modeling
Solid modeling
Voltage
Online AccessGet full text

Cover

More Information
Summary:This paper presents an electromechanical model for a piezoelectric transformer (PT), which is driven at the longitudinal mode. The electromechanical model is established by the coupled equations of motion of the PT, which is derived by the Rayleigh-Ritz method and Hamilton's principle. The Rayleigh-Ritz method allows us to represent a continuous system by a discrete approximation. Thus, the variational expression of Hamilton's principle can be used to model the distributed piezoelectric structure for estimating the parameters of the equivalent circuit model of the PT. Furthermore, the equivalent circuit model is used to estimate the electrical characteristics of the PT. Such as input admittance, voltage step-up ratio, output power and efficiency are derived by the equivalent circuit model. Based on the model, the performance of the beam-type PTs can be predicted by the geometrical dimensions and material parameters in the design stage. The validity of the proposed model is experimentally confirmed.
ISBN:9781424406449
1424406447
ISSN:2164-5256
DOI:10.1109/PEDS.2007.4487712