Nano Science and Technology Institute
MSM 99
MSM 99
Technical Proceedings of the 1999 International Conference on Modeling and Simulation of Microsystems
Chapter 6: Characterization, Parameter Extraction, Calibration

Numerical and Analytical Modeling of the Piezoelectric Transformer and Experimental Verification

Authors:S. Hallaert, E. Sarraute and B. Le Pioufle
Affilation:URA CNRS 1375, FR
Pages:198 - 201
Keywords:transformers, modeling, equivalent circuit, finite element, piezoelectric, longitudinal piezoelectric effect
Abstract:In this paper, to approach the modeling aspect, we have selected a Rosen-type structure of piezo-electric transformer which, for us, seems very interesting from an educational point of view. Two approaches will be presented, (i) The first one consist of performing the analysis with an electric equivalent circuit. The set of hypotheses used in the equivalent circuit method prove to be somewhat restrictive inasmuch as only one type of vibration is being considered, which neglects the coupling phenomena existing in the other directions. (ii) We have therefore added to our modeling approach a more general numerical finite element method using ANSYS software. Because piezoelectric problems are solved as an extension to the total elastic-electric coupling, we have simulated all the 3D structure of the piezoelectric transformer and appreciated the validity of the hypotheses done in the equivalent circuit method. Finally, the results are compared with experimental data in different condition of behavior.
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