Thermo-piezoelectric finite element modeling for piezoelectric transformers
Journal
Japanese Journal of Applied Physics
Journal Volume
47
Journal Issue
4 PART 1
Pages
2182-2188
Date Issued
2008
Author(s)
Abstract
In this paper, we present the development of an efficient three-dimensional finite-element tool, NTUPZE-T, for analyzing the thermal effect of piezoelectric transformers. The tool combines a finite-element piezoelectric solver and a finite-element thermal solver to estimate the temperature distribution during device operation. Device dissipation energy was calculated by considering internal damping effects. This energy is considered as the heat source of the heat transfer equation for estimating the device temperature distribution. Since the material properties of piezoelectric materials are dependent on temperature, a self-consistent thermo-piezoelectric analysis procedure using the relaxation algorithm is proposed. The modeling results of a Rosen-modal-type piezoelectric transformer under different operating frequencies and electrical loads are presented. The experimental setup for measuring the device electrical performance and temperature distribution is described. Simulated voltage gains, phase differences, efficiencies, as well as temperature distributions are also validated with experimental results.
SDGs
Type
journal article