An Autoparametric, Electromagnetic Ambient Vibration Energy Harvester2011
Document TypeConference Proceeding
AbstractResults are presented for the design and testing of an electromagnetic device to convert ambient mechanical vibration into electricity. The design of the device is based on an L-shaped beam structure which is tuned so that the first two (bending) natural frequencies have a (near) two-to-one ratio. This creates an internal resonance or autoparmetic condition that can result in a nonlinear dynamic response to a sinusoidal (base) displacement excitation over an extended frequency range. This is in contrast to single degree-of-freedom, linear-dynamics based vibration harvesters which convert energy in a very narrow frequency band. Representative measurements of displacement and power generated are presented. The problem of fatigue failure in the devices presents limits to their long-term operation.
Citation InformationJohannes Santen, Nitin R. Kapania and Christopher L. Lee. "An Autoparametric, Electromagnetic Ambient Vibration Energy Harvester" (2011)
Available at: http://works.bepress.com/christopher_lee/37/