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Modeling and analysis on ring-type piezoelectric transformers.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2007
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Modeling of a disk-type piezoelectric transformer.

Shine-Tzong Ho1

  • 1Mechanical Engineering Department, Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. stho@cc.kuas.edu.tw

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|November 21, 2007
PubMed
Summary

A new electromechanical model for disk-type piezoelectric transformers (PTs) was developed using vibration analysis and Hamilton's principle. This model accurately predicts PT performance, including efficiency and optimal load resistance, validated by experimental results.

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Mechanical Engineering

Background:

  • Piezoelectric transformers (PTs) offer high voltage step-up capabilities.
  • Accurate electromechanical modeling is crucial for optimizing PT performance.
  • Existing models may not fully capture the dynamic behavior of disk-type PTs.

Purpose of the Study:

  • To propose a novel electromechanical model for disk-type piezoelectric transformers.
  • To analyze the vibration characteristics of piezoelectric disks.
  • To simulate and predict the performance of piezoelectric transformers.

Main Methods:

  • Analysis of vibration characteristics of piezoelectric disks under free boundary conditions.
  • Derivation of electromechanical equations of motion using Hamilton's principle.
  • Simulation of the coupled electromechanical system.

Main Results:

  • The proposed model accurately predicts key performance metrics such as voltage step-up ratio, input/output impedance, power, and efficiency.
  • Optimal load resistance and maximum efficiency for the PT were calculated.
  • Experimental validation confirmed the accuracy of the theoretical model with good agreement.

Conclusions:

  • The developed electromechanical model provides a reliable tool for designing and optimizing disk-type piezoelectric transformers.
  • The model facilitates the prediction of PT performance and identification of optimal operating conditions.
  • The study demonstrates the effectiveness of combining vibration analysis with Hamilton's principle for PT modeling.