Multilevel power converter circuit
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United States of America Patent
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Dec 15, 2015
Grant Date -
Nov 20, 2014
app pub date -
Sep 24, 2012
filing date -
Jan 13, 2012
priority date (Note) -
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Abstract
A multilevel power converter circuit driven by two direct current power supplies in series includes a first semiconductor switch series circuit that combines a series circuit of 2n IGBTs connected between positive and negative electrodes with a capacitor, a second semiconductor switch series circuit that combines a series circuit of 2n−2 IGBTs connected between the emitter of a first IGBT of the first semiconductor switch series circuit and the collector of a 2nth IGBT with a capacitor, and a bidirectional switch connected between an intermediate point of the second semiconductor switch series circuit and an intermediate point of the direct current power supply, to reduce a voltage change in the alternating current output when semiconductor switches are switching.
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