Inversion of piezoelectric material coefficients by using finite element method with Asymptotic Waveform Evaluation

In this paper, a fast inversion scheme for piezoelectric constants of piezoelectric transformer is proposed. The effects of material coefficients on piezoelectric transformers are investigated by using three-dimensional finite element method (FEM) which is confirmed experimentally. A design sensitivity method adopted as an inversion scheme and Asymptotic Waveform Evaluation (AWE) is used for fast frequency sweep.