An Electromagnetic Micro-Power Generator for Low Frequency Vibrations with Tunable Resonance

This paper presents an electromagnetic (EM) micro-power generator with tunable resonance frequency which can harvest energy from low frequency environmental vibrations. The reported power generator up-converts low frequency environmental vibrations before mechanical-to-electrical energy conversion b...

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Bibliographic Details
Published inProcedia engineering Vol. 25; pp. 729 - 732
Main Authors Türkyılmaz, S., Zorlu, Ö., Muhtaroğlu, A., Külah, H.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2011
Subjects
Electromagnetic Power Generation
Energy Harvesting
Frequency-up Conversion
Tunable Resonance Frequency
Frequency-up Conversion
Electromagnetic Power Generation
Energy Harvesting
Tunable Resonance Frequency
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Summary:This paper presents an electromagnetic (EM) micro-power generator with tunable resonance frequency which can harvest energy from low frequency environmental vibrations. The reported power generator up-converts low frequency environmental vibrations before mechanical-to-electrical energy conversion by utilizing two diaphragms with different resonance frequencies. Power is generated through electromagnetic induction by a magnet attached to the low frequency diaphragm, and a 50 turn, 2.1 asterisk coil, and a magnetic piece on the high frequency diaphragm. Both of the diaphragms are fixed to a common frame via rubber springs, which makes the resonance frequency of each diaphragm tunable. The fabricated prototype generates 5.2mV and 3.21 colonW RMS power by up-converting 13Hz, 7.5mm peak-to-peak vibrations to 200Hz. Tunability of the resonance frequency is experimentally verified by operating the same device at 2-30Hz external vibrations.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2011.12.180