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Design and fabrication of a new system for vibration energy harvesting

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5 Author(s)

Global simulations, designs and characterisations of a broadband vibration energy scavenging system are here reported. High damping electrostatic conversion structures have been investigated. Mathematical analytical models have been performed and confronted with ANSYS simulations. A scavenging electronics has also been developed: taking in account ohmic, capacitive and inductive losses, the global conversion efficiency has been calculated. Finally, a macro and a micro resonant structure tuned to 50 Hz have been realized. A scavenged power of 1 mW is already available on the macro structure under a vibration amplitude of 90 μm at 50 Hz. The corresponding global conversion efficiency is about 60 % which is in good agreement with mechanical and electrical simulations.

Published in:

Research in Microelectronics and Electronics, 2005 PhD  (Volume:1 )

Date of Conference:

25-28 July 2005