DEAD-TIME COMPENSATION ALGORITHM FOR 3-PHASE INVERTER USING SVPWM
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United States of America Patent
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Issued Date -
Apr 11, 2013
app pub date -
Nov 14, 2011
filing date -
Oct 5, 2011
priority date (Note) -
Abandoned
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Abstract
Disclosed is a dead-time compensation method of a 3-phase inverter using an SVPWM scheme. The dead-time compensation method includes generating a switching signal having dead-time with respect to the power semiconductor switches of the upper and lower arms in order to obtain a predetermined output through the SVPWM scheme, detecting medium phase current from each phase current output through the switching signal, determining polarity of the medium phase current, and generating a switching signal by calculating switching time in order to compensate for time to apply effective voltage according to the polarity of the medium phase current. Through the dead-time compensation method, the distortion of the output voltage and the reduction of voltage having a fundamental wave in the output voltage, which are caused by the dead-time, are minimized through the switching of compensating for the time to apply effective voltage based on the polarity of the load current.
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