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Open-loop power conditioning for vibration energy harvesters

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2 Author(s)
Burrow, S.G. ; Dept. of Aerosp. Eng., Univ. of Bristol, Bristol, UK ; Clare, L.R.

Energy harvesters feature a high impedance output that complicates subsequent power conditioning because operation in the peak power region violates the stability criterion for converters with voltage regulation. By using a flyback converter in open-loop discontinuous mode and a shunt voltage regulator, it is demonstrated that a harvester can be operated in an optimal manner whilst ensuring stability. A circuit is described that draws the unity power factor from the harvester, provides output voltage regulation and consumes 180 muW of quiescent power.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 19 )

Date of Publication:

September 10 2009

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