A Thermo-piezoelectric Finite-element Solver for Piezoelectric Transformers
Date Issued
2006
Date
2006
Author(s)
Chen, Chien-Cheng
DOI
en-US
Abstract
In this work, we develop a 3-D FEM solver, NTUPZE-T for analyzing piezoelectric transformers. This solver is capable of estimating the device thermal effects. In order to estimate the device temperature distribution when the device operates, we calculate the dissipation of energy based on the internal damping effects. The dissipated energy is considered as the heat source of the heat transfer equation for calculating the temperature distribution of a device. Material constants of piezoelectric materials are usually dependent on temperature. Therefore, a self-consistent thermo-piezoelectric analysis procedure is proposed. In this work, we employ the relaxation algorithm for self-consistently computing the solutions in the piezoelectric domain and the thermal domain. Then the voltage gains, phase difference, efficiencies, as well as the temperature distribution of the device at difference frequencies and loadings can be obtained by the solver. The solver employs 20-node brick-element formulation for the discretization. We analyzed Rosen -modal-type piezoelectric transformer. The simulated results of voltage gains, efficiencies, resonant frequencies, and temperature increase of the device were also verified with the measured results.
Subjects
有限元素法
壓電變壓器
鬆弛演算法
Finite element method
Piezoelectric Transformer
Relaxation algorithm
Type
thesis
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