CPC H02M 5/458 (2013.01) [H02M 7/487 (2013.01); H02M 7/4807 (2013.01); H02J 7/007 (2013.01); H02J 2207/20 (2020.01); H02M 1/4241 (2013.01); H02M 5/225 (2013.01); H02M 5/293 (2013.01); H02M 7/4815 (2021.05); H02M 7/797 (2013.01)] | 20 Claims |
1. A multilevel stage of an AC power converter having at least three levels, comprising:
a set of switches in series, comprising two switches per level;
a set of capacitors in series, having one less capacitor than the number of levels, the set of capacitors being in parallel with the set of switches;
a clamping network interconnecting nodes of the set of switches with nodes of the set of capacitors, to establish incremental voltages across the set of capacitors;
a center tap along the set of switches in series; and
a pair of taps, respectively after the first and before the last switch of the set of switches in series;
wherein the set of switches are operable to transfer power between the center tap operating at a first AC frequency and the pair of taps operating at a second AC frequency.
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