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Related Experiment Videos

High power universal piezoelectric transformer.

Shashank Priya1

  • 1Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX 76019, USA. spriya@uta.edu

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 14, 2006
PubMed
Summary

This study presents a novel multilayer piezoelectric transformer capable of both stepping voltage up and down. Its innovative design ensures efficient operation across a wide frequency range, offering versatile power conversion solutions.

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Energy Conversion

Background:

  • Piezoelectric devices offer unique electromechanical coupling properties.
  • Efficient voltage transformation is crucial for power electronics and energy harvesting.
  • Existing piezoelectric transformers often have limitations in frequency range or voltage conversion capability.

Purpose of the Study:

  • To design and characterize a novel multilayer piezoelectric transformer.
  • To demonstrate both step-up and step-down voltage conversion capabilities.
  • To validate the transformer's performance through experimental analysis and equivalent circuit modeling.

Main Methods:

  • Fabrication of a multilayer piezoelectric transformer with a ring/dot electrode structure on a single ceramic disk.

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  • Utilized radial mode for input and output.
  • Experimental testing in both step-up and step-down configurations under varying loads and power outputs.
  • Equivalent circuit analysis for theoretical validation.

    • Main Results:

    • Prototype transformer (15 x 2.78 mm², 3.8 gm) achieved high efficiency in both configurations.
    • Step-down mode: 92% efficiency, gain=0.21 at 6W output.
    • Step-up mode: 97% efficiency, gain=9.5 at 5W output.
    • Experimental results showed excellent agreement with equivalent circuit analysis.

    Conclusions:

    • The developed multilayer piezoelectric transformer offers efficient and versatile voltage conversion (step-up/step-down).
    • The design operates effectively over a wide frequency range.
    • The findings support the potential of this piezoelectric transformer for various power electronics applications.