Piezoelectric power converter with bi-directional power transfer

Kaspar Sinding Meyer (Inventor), Martin Schøler Rødgaard (Inventor), Michael A. E. Andersen (Inventor), Thomas Andersen (Inventor)

Research output: Patent

121 Downloads (Pure)

Abstract

The present invention relates to a bi-directional piezoelectric power converter com¬ prising a piezoelectric transformer. The piezoelectric transformer comprises an input electrode electrically coupled to a primary section of the piezoelectric transformer and an output electrode electrically coupled to an output section of the piezoelectric transformer to provide a transformer output signal. A bi-directional switching circuit is coupled between the output electrode and a DC or AC output voltage of the power converter. Forward and reverse current conducting periods of the bi-directional switching circuit is based on the input drive signal or the transformer output signal such that a forward current is conducted from the output electrode through the bi¬ directional switching circuit to the DC or AC output voltage in a first state to charge the DC or AC output voltage. In a second state, a reverse current is conducted through the bi-directional switching circuit from the DC or AC output voltage to the output electrode to discharge the DC or AC output voltage and return power to the primary section of the piezoelectric transformer.
Original languageEnglish
IPCH01L41/04; H02M3/338; H02M7/537
Patent numberWO2013083679
Filing date13/06/2013
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Priority date07/01/2011
Priority numberPCT/EP2012/074614
Publication statusPublished - 2014

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