Self-oscillating loop based piezoelectric power converter

Martin Schøler Rødgaard (Inventor), Michael A. E. Andersen (Inventor), Andreas Esbern (Inventor), Kasper Sinding Meyer (Inventor)

Research output: Patent

138 Downloads (Pure)


The present invention relates to a piezoelectric power converter comprising an input driver electrically coupled directly to an input or primary electrode of the piezoelectric transformer without any intervening series or parallel inductor. A feedback loop is operatively coupled between an output voltage of the piezoelectric transformer and the input driver to provide a self-oscillation loop around a primary section of the piezoelectric transformer oscillating at an excitation frequency. Electrical characteristics of the feedback loop are configured to set the excitation frequency of the self- oscillation loop within a zero-voltage-switching (ZVS) operation range of the piezoelectric transformer.
Original languageEnglish
IPCH01L41/04; H02M3/338; H02M7/537
Patent numberWO2013083678
Filing date06/12/2012
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Publication statusPublished - 2013


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