Physics – Classical Physics
Scientific paper
2011-11-10
Smart Materials and Structures, 20, (2011) 105013
Physics
Classical Physics
This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP
Scientific paper
10.1088/0964-1726/20/10/105013
Integration of structures and functions allowed reducing electric consumptions of sensors, actuators and electronic devices. Therefore, it is now possible to imagine low-consumption devices able to harvest their energy in their surrounding environment. One way to proceed is to develop converters able to turn mechanical energy, such as vibrations, into electricity: this paper focuses on electrostatic converters using electrets. We develop an accurate analytical model of a simple but efficient cantilever-based electret energy harvester. Therefore, we prove that with vibrations of 0.1g (~1m/s^{2}), it is theoretically possible to harvest up to 30\muW per gram of mobile mass. This power corresponds to the maximum output power of a resonant energy harvester according to the model of William and Yates. Simulations results are validated by experimental measurements but the issues of parasitic capacitances get a large impact. Therefore, we 'only' managed to harvest 10\muW per gram of mobile mass, but according to our factor of merit, this puts us in the best results of the state of the art. http://iopscience.iop.org/0964-1726/20/10/105013
Boisseau S.
Defay E.
Despesse G.
Ricart T.
Sylvestre A.
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