Simulation of Synchronized-Switching Method Energy Harvester Including Accurate Piezoceramic Nonlinear Behavior

Benjamin Ducharne (1) , Bhaawan Gupta (1, 2) , Grzegorz Litak (3)

1 LGEF - Laboratoire de Génie Electrique et Ferroélectricité
2 ELyTMaX
3 Lublin University of Technology

Synchronized switching techniques have significantly enhanced the energy harvested from semi-passive and active surrounding ambient mechanical vibrations harvesters; they have allowed a large improvement of vibration control efficiency using piezoelectric devices. Unfortunately, for such techniques, dielectric limitations appear as soon as the piezo-ceramic operates under external solicitation of higher amplitudes and frequencies. Under extreme conditions, active materials exhibit a non-linear behavior related to the dielectric hysteresis which reduce significantly their performances. In this work, we focus on consideration of this nonlinear behavior and its consequences in terms of system efficiency. In this aim we apply a realistic model including accurate material laws. In such models, a constant piezoelectric coupling d 31 is no more suitable as a coefficient and it should be replaced by a function depending on the polarization level through the active material. The response of such more realistic systems including hysteresis taken into account is compared to the basic model where a constant d 31 is considered.

Domaines: Sciences de l'ingénieur [physics]

Benjamin Ducharne, Bhaawan Gupta, Grzegorz Litak. Simulation of Synchronized-Switching Method Energy Harvester Including Accurate Piezoceramic Nonlinear Behavior. Energies, 2019, 12 (23), pp.4466. ⟨10.3390/en12234466⟩. ⟨hal-02559853⟩