Harvesting vibration energy using nonlinear oscillations of an electromagnetic inductor

Christopher Lee; David Stamp; Nitin R. Kapania; José Oscar Mur-Miranda

doi:10.1117/12.849895

28 April 2010 Harvesting vibration energy using nonlinear oscillations of an electromagnetic inductor

Christopher Lee, David Stamp, Nitin R. Kapania, José Oscar Mur-Miranda

Proceedings Volume 7683, Energy Harvesting and Storage: Materials, Devices, and Applications; 76830Y (2010) https://doi.org/10.1117/12.849895
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Harvesting energy from ambient vibration is a promising method for providing a continuous source of power for wireless sensor nodes. However, traditional energy harvesters are often derived from resonant linear oscillators which are capable of providing sufficient output power only if the dominant frequency of input vibrations closely matches the device resonant frequency. The limited scope of such devices has sparked an interest in the use of nonlinear oscillators as mechanisms for broadband energy harvesting. In this study, we investigate the harvesting performance of an electromagnetic harvester sustaining oscillations through the phenomena of magnetic levitation. The nonlinear behavior of the device is effectively modeled by Duffing's equation, and direct numerical integration confirms the broadband frequency response of the nonlinear harvester. The nonlinear harvester's power generation capabilities are directly compared to a linear electromagnetic harvester with similar dynamic parameters. Experimental testing shows that the presence of both high and low amplitude solutions for the nonlinear energy harvester results in a tendency for the oscillator to remain in a low energy state for non-harmonic vibration inputs, unless continuous energy impulses are provided. We conclude by considering future applications and improvements for such nonlinear devices.

Citation Download Citation

Christopher Lee, David Stamp, Nitin R. Kapania, and José Oscar Mur-Miranda "Harvesting vibration energy using nonlinear oscillations of an electromagnetic inductor", Proc. SPIE 7683, Energy Harvesting and Storage: Materials, Devices, and Applications, 76830Y (28 April 2010); https://doi.org/10.1117/12.849895

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