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High electromechanical coupling of a broadband PZT-based vibration energy harvester

Abstract : This paper reports on the design and experiment of a highly-coupled piezoelectric energy harvester. Such a device is necessary to benefit from non-linear electrical techniques to improve the frequency bandwidth. We improve a previously developed 2-degree of freedom (2-DOF) analytical model with the Rayleigh method to understand 2-dimensional electromechanical interactions and give a preliminary design a PZT-5A cantilever. Then, we use 3D Finite Element Method (FEM) simulations to take into account 3-dimensional effects. The resulting device demonstrates a strong squared electromechanical coupling coefficient (k²=15.0% for the 1 st mode).
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https://hal.archives-ouvertes.fr/hal-02948282
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Submitted on : Thursday, September 24, 2020 - 3:20:42 PM
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  • HAL Id : hal-02948282, version 1

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David Gibus, Pierre Gasnier, Adrien Morel, Sebastien Boisseau, Adrien Badel. High electromechanical coupling of a broadband PZT-based vibration energy harvester. International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA 2019), Oct 2019, Lyon, France. ⟨hal-02948282⟩

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