US 11,689,115 B2
Bidirectional AC-DC converter with multilevel power factor correction
Kalyan Yenduri, Narakodur (IN); Sunil Dube, Vestal, NY (US); Pritam Das, Vestal, NY (US); and Benson Chan, Vestal, NY (US)
Assigned to The Research Foundation for The State University o, Binghamton, NY (US)
Filed by The Research Foundation for The State University of New York, Binghamton, NY (US)
Filed on Oct. 4, 2021, as Appl. No. 17/449,875.
Claims priority of provisional application 63/087,174, filed on Oct. 2, 2020.
Prior Publication US 2022/0109381 A1, Apr. 7, 2022
Int. Cl. H02M 5/458 (2006.01); H02M 7/487 (2007.01); H02M 7/48 (2007.01); H02J 7/00 (2006.01); H02M 7/797 (2006.01); H02M 1/42 (2007.01); H02M 5/22 (2006.01); H02M 5/293 (2006.01)
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
OG exemplary drawing
 
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.