Resistive Matching with a Feed-Forward Controlled Non-Synchronous Boost Rectifier for Electromagnetic Energy Harvesting

P. P. Proynov*, G. D. Szarka, B. H. Stark, N. McNeill

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)

Abstract

Impedance matching techniques have been shown to extract close to the maximum theoretical power from kinetic energy harvesters. The output impedance of electromagnetic energy harvesters is frequency-dependent, which must be compensated for by the interfacing power electronics. Switched mode power converters are used to synthesise optimum, matched load impedance, controlled typically by varying duty ratio pulse width modulated gate signals. The emulated input impedance of the power converter is affected by factors such as the input and output voltage levels. In this paper, the non-synchronous boost rectifier, operated entirely in discontinuous current conduction mode, is controlled dynamically to ensure that the emulated input resistance remains at a set value under varying input and output conditions. This is achieved by employing a feed-forward control scheme that is based on calculating the time-varying optimum duty ratio as a function of the excitation frequency, the generated voltage and the converter output voltage, following the analytically derived equations. Experimental results are obtained using the proposed feed-forward control method implemented on a real-time platform. The results demonstrate the effectiveness of the presented control in terms of emulating a set resistance, and the average power that can be extracted using optimum resistance matching over a range of excitation frequencies.

Original languageEnglish
Title of host publication2013 TWENTY-EIGHTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2013)
Place of PublicationNEW YORK
PublisherIEEE Computer Society
Pages3081-3086
Number of pages6
ISBN (Print)978-1-4673-4355-8
Publication statusPublished - 2013
Event28th Annual IEEE Applied Power Electronics Conference and Exposition ()APEC) - Long Beach, Canada
Duration: 17 Mar 201321 Mar 2013

Publication series

NameAnnual IEEE Applied Power Electronics Conference and Exposition (APEC)
PublisherIEEE
ISSN (Print)1048-2334

Conference

Conference28th Annual IEEE Applied Power Electronics Conference and Exposition ()APEC)
CountryCanada
Period17/03/1321/03/13

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