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Updated: Aug 9, 2026

Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
Published on: November 14, 2025
New equivalent lumped electrical circuit for piezoelectric transformers
Paul Gonnard1, P M Schmitt, Michel Brissaud
1Laboratoire de Génie Electrique et Ferroélectricité, Institut National des Sciences Appliquées de Lyon, Bâtiment Gustave Ferrié, 69621 Villeurbanne cedex, France.
Abstract:
A new equivalent circuit is proposed for a contour-vibration-mode piezoelectric transformer (PT). It is shown that the usual lumped equivalent circuit derived from the conventional Mason approach is not accurate. The proposed circuit, built on experimental measurements, makes an explicit difference between the elastic energies stored respectively on the primary and secondary parts. The experimental and theoretical resonance frequencies with the secondary in open or short circuit are in good agreement as well as the output "voltage-current" characteristic and the optimum efficiency working point. This circuit can be extended to various PT configurations and appears to be a useful tool for modeling electronic devices that integrate piezoelectric transformers.
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