Increasing the Efficiency of Energy Scavengers

Details Increasing the Efficiency of Energy Scavengers Increasing the Efficiency of Energy Scavengers

2007-08-31

arxiv.org/abs/0708.4412v2

Nonlinear Sciences

Chaotic Dynamics

28 pages, 14 figures

Scientific paper

In this paper, a methodology for designing efficient energy scavengers is proposed. The scavenger consists of a cantilever beam on which piezoelectric films and a mass are mounted. The mass at the tip of the beam is known as the proof mass and the device is called either an energy scavenger or a beam-mass system. The proof mass is a permanent magnet, where in its vicinity attracting permanent magnets are placed. It is shown that when the magnets have appropriate strengths and are placed appropriately, the vibration of the beam-mass system can be amplified, thereby the scavenged energy is increased. Examples are given throughout the paper.

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