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27 March 2018 Autonomous electrostatic generator for energy harvesting applications under inertial load
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Vibration-based energy harvesters have been extensively studied and investigated to harvest the energy produced by environmental mechanical vibration sources as mean to produce low electrical energy, thereby supplying low-power sensors and actuators. Different devices have been proposed as energy harvesters, cantilevers-based geometries have been pursued frequently in the literature. Here, we propose the geometry of an elastomeric circular membrane coupled with an electret (soft electrostatic generator) with a central proof mass. By soliciting the designed device around its resonance frequency of 14Hz with an acceleration of 0.4g for a mass of 9.5g, the system produced an average electric power of 24μW for an optimal resistance of 150MΩ. An analytical study developed closely with a finite element simulation with Comsol® allowed to validate the obtained experimental results, suggesting that this approach can be used as a tuning method to develop other geometrical shapes and conceive large-scale devices for vibration energy harvesting applications.
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Clara Lagomarsini, Achraf Kachroudi, Skandar Basrour, Claire Jean-Mistral, and Alain Sylvestre "Autonomous electrostatic generator for energy harvesting applications under inertial load", Proc. SPIE 10594, Electroactive Polymer Actuators and Devices (EAPAD) XX, 105941Q (27 March 2018);

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