Low-power energy harvester for wiegand transducers

This paper discusses the use of Wiegand magnetic sensors as energy harvesters for powering low-power electronic equipments. A Wiegand device typically releases a ~10 μs voltage pulse several volts wide when subject to an external, time-varying magnetic field. Due to the sharpness of the magnetic tra...

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Bibliographic Details
Published in2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 453 - 459
Main Authors Ongaro, F., Saggini, S., Corradini, L.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2013
Subjects
Approximation methods
Batteries
Load modeling
Magnetic cores
Magnetic hysteresis
Magnetic sensors
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Summary:This paper discusses the use of Wiegand magnetic sensors as energy harvesters for powering low-power electronic equipments. A Wiegand device typically releases a ~10 μs voltage pulse several volts wide when subject to an external, time-varying magnetic field. Due to the sharpness of the magnetic transition, pulse generation occurs regardless of how slow the magnetic field variation is, an attractive feature which enables its use in energy harvesting scenarios even when low-frequency sources are considered. The paper first identifies the theoretical conditions for maximum energy extraction. An efficient energy harvesting circuit is then proposed which interfaces the Wiegand source to a fixed DC voltage provided, for instance, by a rechargeable Lithium-Ion battery. Simulations and experimental results are provided supporting the developed theoretical framework and the effectiveness of the proposed implementation.
ISBN:1467343544
9781467343541
ISSN:1048-2334
DOI:10.1109/APEC.2013.6520249