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Modeling and design of an electromagnetic vibration energy harvester and its dedicated energy extraction circuit

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3 Author(s)
Arroyo, E. ; SYMME, Univ. of Savoie, Annecy-Le-Vieux, France ; Badel, A. ; Formosa, F.

This work investigates the design of an electromagnetic generator including its energy extraction and conditioning circuit. The normalized model of an electromagnetic generator points out three dimensionless parameters, characteristic of the generator. The power harvested with the SMFE (Synchronized Magnetic Flux Extraction) circuit is theoretically calculated and compared to the power extracted with a conventional approach. Optimal parameters orders of magnitude are pointed out for each technique, and a literature review shows that existing electromagnetic generators parameters are not suitable to harvest the maximum normalized power. Based on these considerations the design of an electromagnetic generator adapted to the SMFE technique is proposed. The results of the optimization predicts a theoretical harvested power of 19 mW for an external vibration acceleration of 2g, and a resonance frequency of 100 Hz.

Published in:

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Date of Conference:

13-16 May 2012