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Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring

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Switching loss reduction in nonlinear piezoelectric conversion under pulsed loading.

Daniel Guyomar¹, Mickaël Lallart

¹Laboratoire de Génie Electrique et Ferroélectricite (LGEF), Institut National des Sciences Appliquées de Lyon (INSA-Lyon), Lyon, France.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|March 25, 2011

Summary

Researchers developed a new method to boost energy conversion in piezoelectric materials. This technique reduces electrical losses, increasing usable energy by up to three times, especially in systems with limited power.

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Area of Science:

Materials Science
Electrical Engineering
Energy Harvesting

Background:

Piezoelectric materials are crucial for energy conversion.
Nonlinear voltage treatments enhance piezoelectric performance but cause significant electrical losses.
These losses are particularly problematic in low-energy or pulsed excitation scenarios.

Purpose of the Study:

To introduce an efficient method for reducing electrical losses in piezoelectric energy conversion.
To improve the overall energy output from piezoelectric materials under limited energy conditions.

Main Methods:

Implementing a novel approach based on the transfer of electrostatic energy.
Focusing on energy transfer during the decrease phase of electrostatic energy.
Analyzing the impact on weakly coupled electromechanical systems.

Main Results:

The proposed method significantly reduces electrical losses.
Achieved an increase in converted energy by a factor of up to 3.
Demonstrated particular effectiveness in weakly coupled electromechanical systems.

Conclusions:

The developed electrostatic energy transfer technique offers a substantial improvement in piezoelectric energy conversion efficiency.
This method provides a practical solution for maximizing energy harvesting from limited or pulsed mechanical excitations.
The findings are especially relevant for optimizing energy conversion in micro-scale and low-power applications.