High-power, multioutput piezoelectric transformers operating at the thickness-shear vibration mode

Area of Science:

• Materials Science
• Electrical Engineering
• Physics

Background:

• Piezoelectric transformers offer efficient power conversion.
• Developing multi-output transformers is crucial for versatile electronic devices.

Purpose of the Study:

• To propose and analyze a novel piezoelectric transformer with dual or triple outputs.
• To evaluate its performance in terms of efficiency, power handling, and voltage gain.

Main Methods:

• Utilized a lead zirconate titanate (PZT) ceramic plate with a high mechanical quality factor (Qm).
• Designed a unique electrode configuration and support structure for the transformer.
• Operated the transformer in the thickness shear vibration mode.

Main Results:

• Achieved maximum total output power of 169.8 W (dual output) and 163.1 W (triple output).
• Reached efficiencies of up to 98% (dual output) and 95.7% (triple output) with minimal temperature rise.
• Demonstrated independent voltage gain characteristics across different outputs within a specific frequency range.

Conclusions:

• The proposed piezoelectric transformer demonstrates high performance and efficiency for multi-output power delivery.
• The design offers potential for compact and efficient power supplies in various electronic systems.
• The independent output characteristics suggest suitability for applications requiring tailored power distribution.