Identification of material constants for piezoelectric transformers by three-dimensional, finite-element method and a design-sensitivity method

In this paper, an inversion scheme for piezoelectric constants of piezoelectric transformers is proposed. The impedance of piezoelectric transducers is calculated using a three-dimensional finite element method. The validity of this is confirmed experimentally. The effects of material coefficients o...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2003-08, Vol.50 (8), p.965-971
Main Authors: JOO, Hyun-Woo, LEE, Chang-Hwan, RHO, Jong-Seok, JUNG, Hyun-Kyo SR
Format: Article
Language:English
Subjects:
Acoustics
Constants
Design methodology
Dielectric materials
Elasticity
Equations
Equivalent circuits
Exact sciences and technology
Finite element method
Finite element methods
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Inversions
Magnetic resonance
Materials selection
Mathematical analysis
Mathematical models
Physics
Piezoelectric materials
Piezoelectricity
Power supplies
Transducers
Transformers
Ultrasonics, quantum acoustics, and physical effects of sound
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Summary:In this paper, an inversion scheme for piezoelectric constants of piezoelectric transformers is proposed. The impedance of piezoelectric transducers is calculated using a three-dimensional finite element method. The validity of this is confirmed experimentally. The effects of material coefficients on piezoelectric transformers are investigated numerically. Six material coefficient variables for piezoelectric transformers were selected, and a design sensitivity method was adopted as an inversion scheme. The validity of the proposed method was confirmed by step-up ratio calculations. The proposed method is applied to the analysis of a sample piezoelectric transformer, and its resonance characteristics are obtained by numerically combined equivalent circuit method.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2003.1226540