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A wideband vibration-based energy harvester

2008; IOP Publishing; Volume: 18; Issue: 11 Linguagem: Inglês

10.1088/0960-1317/18/11/115021

1361-6439

M. S. M. Soliman, Eihab Abdel‐Rahman, Ehab F. El‐Saadany, Raafat R. Mansour,

Wireless Power Transfer Systems

We present a new architecture for wideband vibration-based micro-power generators (MPGs). It replaces a linear oscillator with a piecewise-linear oscillator as the energy harvesting element of the MPG. A prototype of an electromagnetic MPG designed accordingly is analyzed analytically, numerically and experimentally. We find that the new architecture increases the bandwidth of the MPG during a frequency up-sweep, while maintaining the same bandwidth in a down-sweep. Closed-form expressions for the response of the new MPG as well as the up-sweep bandwidth are presented and validated experimentally. Simulations show that under random-frequency excitations, the new MPG collects more energy than the traditional MPG.