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Compact electret energy harvester with high power output

: Pondrom, P.; Sessler, G.M.; Bös, J.; Melz, Tobias


Applied Physics Letters 109 (2016), Nr.5, Art. 053906, 6 S.
ISSN: 0003-6951
ISSN: 1077-3118
Fraunhofer LBF ()
compact electret energy harvester; high power output

Compact electret energy harvesters, based on a design recently introduced, are presented. Using electret surface potentials in the 400V regime and a seismic mass of 10 g, it was possible to generate output power up to 0.6 mW at 36 Hz for an input acceleration of 1 g. Following the presentation of an analytical model allowing for the calculation of the power generated in a load resistance at the resonance frequency of the harvesters, experimental results are shown and compared to theoretical predictions. Finally, the performance of the electret harvesters is assessed using a figure of merit.