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Finite element simulation of piezoelectric transformers
T Tsuchiya1, Y Kagawa, N Wakatsuki
1Department of Electronics and Information Systems, Akita Prefectural University, Honjo City, Akita, Japan.
Summary
This study analyzes piezoelectric transformers using 3D finite element modeling. The PIEZO3D code accurately simulates transformer behavior, including coupled vibration modes, guiding improved piezoelectric transformer design.
Area of Science:
- Electrical Engineering
- Materials Science
- Acoustics
Background:
- Piezoelectric transformers convert electrical energy to mechanical energy for voltage transformation.
- Traditional analysis relies on empirical equivalent circuit models.
- Understanding complex vibration modes is crucial for optimal design.
Purpose of the Study:
- To analyze piezoelectric transformers using advanced 3D finite element modeling (FEM).
- To validate the PIEZO3D code by comparing simulations with experimental results.
- To investigate the impact of coupled vibration modes on transformer performance.
Main Methods:
- Developed and modified the PIEZO3D code for 3D FEM analysis.
- Incorporated external loading and various electrical boundary conditions.
- Simulated low-intensity operation of Rosen-type piezoelectric transformers.
Main Results:
- The FEM simulation accurately predicted transformer behavior.
- Observed double resonances in experiments were explained by coupled longitudinal and flexural modes.
- The simulation provided insights into the influence of multiple vibration modes.
Conclusions:
- 3D FEM provides a powerful tool for analyzing piezoelectric transformers.
- The PIEZO3D code accurately captures complex phenomena like mode coupling.
- This simulation approach offers valuable guidance for designing efficient piezoelectric transformers.