Resonant circuit inverter with controllable operating point
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United States of America Patent
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Mar 10, 2015
Grant Date -
Nov 1, 2012
app pub date -
Nov 18, 2011
filing date -
Apr 29, 2011
priority date (Note) -
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Abstract
A resonant circuit inverter with a rectifier, a DC link circuit and an inverter including controllable switches. The resonant circuit inverter has a first control means, with which the operating point (Ap) of the resonant circuit inverter determined by a phase angle between an output current (Iist) and a voltage (Uist) at the output of the resonant circuit inverter is controlled. The first control means determines frequency of the output current (Iist). The resonant circuit inverter has a phase detector for determining an actual phase angle as a function of a zero crossing of the output current (Iist). The resonant circuit inverter has means for detecting a zero crossing of the output current (Iist). For determining the actual phase angle, the difference (Ti−Tt) is determined from measured time (Ti) and a known dead time (Tt).
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