Design and test of a Bennet's doubler device with mechanical switches for vibrational energy harvesting
M. A. Ben Ouanes,M. A. Ben Ouanes,Y. Lu,Hatem Samaali,Hatem Samaali,Philippe Basset,Fehmi Najar +6 more
- Vol. 773, Iss: 1, pp 012038
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TLDR
In this article, the use of self-synchronized mechanical switches in replacement of diodes into electrostatic vibration energy harvesters (e-VEH) can lead to better power generation.Abstract:
In this work, we demonstrate that the use of self-synchronized mechanical switches in replacement of diodes into electrostatic vibration energy harvesters (e-VEH) can lead to better power generation. Indeed, mechanical switches have the advantage of no leakage current and no threshold voltage. As a proof of concept, we use the Bennet's doubler electrostatic generator. The proposed e-VEH is composed of two variable capacitors triggered by a central electrode taken as an inertial mass. Ambient vibrations induce inertial forces on the central electrode, as a result a voltage doubling is obtained at each operating cycle. The mechanical switches are directly fixed to the moving electrode. In addition, no dedicated pre-charge is required: the system starts with ambient electrical charges. The device is fabricated and tested under harmonic motion. A comparison between the proposed design and those using diodes under the same operating conditions shows an experimental direct increase of the harvested electrical power of around 28%.read more
Citations
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A new type of triboelectric nanogenerator with self-actuated series-to-parallel electrical interface based on self-synchronized mechanical switches for exponential charge accumulation in a capacitor
M. A. Ben Ouanes,M. A. Ben Ouanes,Hatem Samaali,Hatem Samaali,Hatem Samaali,Dimitri Galayko,Philippe Basset,F. Najar +7 more
TL;DR: In this article, the impact-based nanogenerators (TENGs) have three electrodes and self-synchronized/self-actuated mechanical switches, which automatically connect the capacitances of the system according to their series and parallel configurations in order to reproduce a behaviour similar to the Bennet's charge doubler.
References
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Journal ArticleDOI
Energy harvesting from low frequency applications using piezoelectric materials
TL;DR: This paper reviews the current state of research on piezoelectric energy harvesting devices for low frequency (0–100 Hz) applications and the methods that have been developed to improve the power outputs of the piezoesterday's energy harvesters.
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MEMS Vibration Energy Harvesting Devices With Passive Resonance Frequency Adaptation Capability
TL;DR: In this article, the authors propose an innovative approach to achieve a completely passive, wideband adaptive system by employing mechanical nonlinear strain stiffening, which is obtained through high built-in stresses between layers in these devices.
Journal ArticleDOI
Electret-Free Micromachined Silicon Electrostatic Vibration Energy Harvester With the Bennet’s Doubler as Conditioning Circuit
TL;DR: In this article, a self-limiting effect on the harvested power of a microelectromechanical system electrostatic vibration energy harvester (e-VEH) and the Bennet's doubler circuit was observed.
Journal ArticleDOI
Modeling and parametric analysis of a unimorph piezocomposite energy harvester with interdigitated electrodes
TL;DR: In this paper, the authors derived an accurate parameterized analytical model of a vibration-based energy harvester using piezocomposite material and interdigitated electrodes, which was used to analyze and optimize the harvested electrical energy under different resistance loads and excitation frequencies.