Dead-Time Selection In Power Converters
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United States of America Patent
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Issued Date -
Mar 5, 2015
app pub date -
Aug 8, 2014
filing date -
Aug 30, 2013
priority date (Note) -
Abandoned
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Abstract
A method is provided of determining a time interval between switching events for a switching device in a power converter, the switching device being for coupling a direct current (DC) source to provide an alternating current (AC) output at a particular switching frequency. The method comprises selecting an initial length of a time interval between a first switching event and a second, subsequent switching event for the switching device and obtaining a current measurement value for the switching device when the time interval between the first switching event and the second, subsequent switching event takes said initial length. The method further comprises changing the length of the time interval between the first switching event and the second, subsequent switching event and obtaining a current measurement value for the switching device when the length of the time interval is changed. The current measurement values which have been obtained are used to detect generation of a current in the switching device. It is then determined, from the change made to the length of the time interval and the current measurement values obtained, a length (tg) of the time interval at which said generation of a current in the switching device occurs.
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