Multi-modal vibration energy harvesting using a trapezoidal plate

Author's Department

Mechanical Engineering Department

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https://doi.org/10.1115/1.4005837

Document Type

Research Article

Publication Title

Journal of Vibration and Acoustics, Transactions of the ASME

Publication Date

7-18-2012

doi

10.1115/1.4005837

Abstract

Vibration-based energy harvesters are usually designed to exhibit natural frequencies that match those of the excitation for maximum power output. This has spurred interest into the design of devices that respond to variable frequency sources. In this work, an electromagnetic energy harvester in the form of a base excited trapezoidal plate is proposed. The plate geometry is designed to achieve two closely spaced vibration modes in order to harvest energy across a broader bandwidth. The ensuing bending and twisting vibrations are utilized in this capacity by placing a magnet on the plate tip that moves past a stationary coil. A dynamic model is presented to predict the system performance and is verified experimentally. © 2012 American Society of Mechanical Engineers.

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1

Last Page

6

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