Comparison of monostable and bistable configurations for wideband energy harvesters

Ferdaous Moalla, Sonia Bradai, Slim Naifar, Olfa Kanoun

Abstract

Extracting energy from ambient vibration to power wireless sensors and other electronic devices is well needed. Many existing harvesters are linear systems working at one resonant frequency. To overcome this limitation, different strategies has been developed to increase the frequency range and to broaden the bandwidth of the harvester. For the electromagnetic energy harvester type, nonlinear behavior introduced by magnetic interactions is currently a central issue to enlarge the frequency bandwidth. A new feature in this study is to create a bistable potential well by inserting an external ring magnet to broaden the frequency spectrum of the non-linear generator. A finite element model to compare the proposed bistable configurations with monostable is developed. An experimental Set-up is realized for the adopted solutions.

Keywords

electromagnetic, energy harvester, bistable, non-linear, bandwidth

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IMEKO-TC19-2014-010.pdf

DOI

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IMEKO TC

TC19 - Environmental Measurements

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