Multilevel power convertor
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United States of America Patent
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Mar 20, 2018
Grant Date -
May 19, 2016
app pub date -
May 23, 2014
filing date -
Jun 25, 2013
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Abstract
Basic circuit of U phase includes first to fourth semiconductor elements (SU1.1 to SU1.4) connected between positive and negative ends of DC voltage source (DCC1), fifth semiconductor element (SU1.5) connected to a common connection point of the first and second semiconductor elements (SU1.1, SU1.2), and sixth semiconductor element (SU1.6) connected to a common connection point of the third and fourth semiconductor elements (SU1.3, SU1.4). Flying capacitor (FC1) is inserted between the fifth semiconductor element (SU1.5) and the sixth semiconductor element (SU1.6). Voltage selection circuits have the common connection points of the second and third semiconductor elements (SU1.2, SU1.3) of the respective basic circuits as input terminals, and includes semiconductor elements (SU1 to SU4) between the input terminals and output terminals (U, V, W). Consequently, it is possible to output arbitrary voltage in all phases in multilevel power convertor, and to simplify control for outputting arbitrary voltage level in all phases.
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