SELF-OSCILLATING LOOP BASED PIEZOELECTRIC POWER CONVERTER
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
Dec 6, 2012
filing date -
Dec 7, 2011
priority date (Note) -
Abandoned
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Abstract
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.
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