Ultra-wide bandwidth piezoelectric energy harvesting

By A. Hajati, Sang-Gook Kim. 2011

313 citations recorded by the source corpus.

Here, we present an ultra wide-bandwidth energy harvester by exploiting the nonlinear stiffness of a doubly clamped microelectromechanical systems (MEMSs) resonator. The stretching strain in a doubly clamped beam shows a nonlinear stiffness, which provides a passive feedback and results in amplitude-stiffened Duffing mode resonance. This design has been fabricated into a compact MEMS device, which is about the size of a US quarter coin. Based on the open circuit voltage measurement, it is expected to have more than one order of magnitude improvement in both bandwidth (more than 20% of the peak frequency) and power density (up to 2 W/cm3) in comparison to the devices previously reported.

Subfields: Biomedical Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/b6900971e4df07c8cf610afd6e2bdce6a4fe6061

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In Biomedical Engineering

In Mechanical Engineering

Citations in the corpus

Experimental and theoretical studies on MEMS piezoelectric vibrational energy harvesters with mass loading (2012, background): “The cost will continue to drop with increasing fabrication volume, just like computer-chips [17].”
Novel piezoelectric bistable oscillator architecture for wideband vibration energy harvesting (2013, methodology): “Hajati and Kim [9] utilized the stretching strain in double clamped beams to induce hardening stiffness in a piezoelectric harvester.”
Recent Progress on PZT Based Piezoelectric Energy Harvesting Technologies (2016, background): “Modified cantilever structure [51], diaphragm structure [52], etc.”
A Review on Piezoelectric Energy Harvesting: Materials, Methods, and Circuits (2017, background): “For example, Hajati’s non-linear beam energy harvester (Hajati and Kim 2011) showed 1–3 orders higher NVPD than that of any reported devices, but has a relatively low NAPD since it has very thin PZT (0.25 μm) over large area (120mm).”