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Related Experiment Videos

Model based analysis of piezoelectric transformers.

T Hemsel1, S Priya

  • 1Heinz Nixdorf Institute, University of Paderborn, Fuerstenallee 11, 33102 Paderborn, Germany. hemsel@hni.upb.de <hemsel@hni.upb.de>

Ultrasonics
|July 1, 2006
PubMed
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This study introduces a novel piezoelectric transformer design using radial mode and unidirectional polarization. The new design achieves high power density and voltage gain, crucial for emerging electrical applications.

Area of Science:

  • Electrical Engineering
  • Materials Science
  • Energy Conversion

Background:

  • Piezoelectric transformers offer advantages like small size, high efficiency, and no electromagnetic noise.
  • Emerging applications like AC/DC converters and battery chargers require higher power density and voltage gain than current designs provide.
  • Existing piezoelectric transformer power density is limited to 40 W/cm³ at low voltage gain.

Purpose of the Study:

  • To investigate a novel piezoelectric transformer design for enhanced power density and wider voltage gain.
  • To explore the potential of radial mode operation and unidirectional polarization for improved performance.
  • To develop and validate an electro-mechanical equivalent circuit model for deterministic design.

Main Methods:

  • A new piezoelectric transformer design utilizing radial mode at input/output and unidirectional ceramic polarization was developed.

Related Experiment Videos

  • An electro-mechanical equivalent circuit model was created to simulate and analyze transformer characteristics.
  • Experimental validation was performed to compare model predictions with actual performance.

    • Main Results:

    • The new design achieved 30 W power output with 98% efficiency and a 30°C temperature rise.
    • The electro-mechanical equivalent circuit model accurately predicted the transformer's characteristics.
    • Excellent agreement was observed between computed and experimental results.

    Conclusions:

    • The developed piezoelectric transformer design demonstrates potential for higher power density and wider voltage gain.
    • The validated electro-mechanical model enables deterministic design of unipoled piezoelectric transformers.
    • Unipoled piezoelectric transformers are expected to become increasingly important in electrical components.