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Multilayer modal actuator-based piezoelectric transformers.

Yao-Tien Huang1, Wen-Jong Wu, Yen-Chieh Wang

  • 1Institute of Applied Mechanics, National Taiwan University, Taipei.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|March 3, 2007
PubMed
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This study introduces a novel multilayer piezoelectric transformer with a unique input electrode design for efficient energy transfer. This innovation enhances operational efficiency and broadens the working frequency range compared to conventional devices.

Area of Science:

  • Electrical Engineering
  • Materials Science
  • Mechanical Engineering

Background:

  • Traditional piezoelectric transformers face limitations in energy transfer efficiency and operational frequency range.
  • Existing designs often lack precise control over excited vibration modes, impacting performance.

Purpose of the Study:

  • To develop an innovative multilayer piezoelectric transformer with enhanced energy transfer efficiency and a wider optimal working frequency range.
  • To introduce a novel input electrode design featuring full modal filtering for precise vibration mode control.

Main Methods:

  • Design and fabrication of a three-layer piezoelectric transformer: multilayered input, insulation, and single output layer.
  • Utilizing a modal-shaped input electrode based on the orthogonal property of structural vibration modes for full modal filtering.

Related Experiment Videos

  • Employing low temperature, co-fired ceramic (LTCC) for the insulation layer to ensure mechanical coupling and electrical insulation.

    • Main Results:

    • The developed piezoelectric transformer demonstrates more efficient energy transfer compared to traditional designs.
    • A wider optimal working frequency range was achieved with the new design.
    • The full modal filtering input electrode effectively excites only the desired vibration mode.

    Conclusions:

    • The novel multilayer piezoelectric transformer with a full modal filtering input electrode offers superior performance in energy transfer and operational frequency.
    • The use of LTCC in the insulation layer effectively couples mechanical energy while providing electrical insulation.
    • This technology presents a viable solution for applications such as inverters for LCD monitors and portable displays.