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Dynamic Simulation of an Electromechanical Energy Scavenging Device

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6 Author(s)
Bonisoli, E. ; Dept. of Production Syst. & Bus. Econ., Politec. di Torino, Torino, Italy ; Canova, A. ; Freschi, F. ; Moos, S.
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This paper presents a multi-physic modeling of an electromechanical energy scavenging device. A permanent magnet, connected to the inner liner of a tyre, is accelerated along a guide by the tyre deformation during car motion; by interacting with coils it generates a power which is conditioned by a proper electronic interfaced to an external load. The energy conversion process takes into account the simulation of different phenomena like: dynamic behavior of the seismic mass, electromagnetic coupling between moving mass and coils, transfer of the generated power to an external load by means of a nonlinear circuit interface. An integrated model of the cascaded energy steps is developed inside the Simulink environment. A good agreement is found in the comparison between theoretical model and experiments. The accurate modeling of the energy conversion device is a breakthrough in the modeling of these kinds of devices and allows to reach interesting power/volume ratios: small dimensions (about one cubic centimeter) and relatively high power output (more than one milliwatt).

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 8 )