US 11,990,850 B2
Soft switched voltage source inverter
Indra Prakash, Bangalore (IN); Damir Klikic, Waltham, MA (US); and Chandrasekaran Jayaraman, Bangalore (IN)
Assigned to SCHNEIDER ELECTRIC IT CORPORATION, Foxboro, MA (US)
Filed by SCHNEIDER ELECTRIC IT CORPORATION, Foxboro, MA (US)
Filed on Jun. 21, 2023, as Appl. No. 18/212,215.
Application 18/212,215 is a continuation of application No. 17/386,019, filed on Jul. 27, 2021, granted, now 11,728,747.
Claims priority of application No. 202011032979 (IN), filed on Jul. 31, 2020.
Prior Publication US 2023/0353064 A1, Nov. 2, 2023
Int. Cl. H02M 7/5387 (2007.01); H02J 9/06 (2006.01); H02M 1/00 (2006.01); H02M 1/12 (2006.01); H02M 7/00 (2006.01); H02M 7/48 (2007.01)
CPC H02M 7/53873 (2013.01) [H02J 9/062 (2013.01); H02M 1/0003 (2021.05); H02M 1/0058 (2021.05); H02M 1/126 (2013.01); H02M 7/003 (2013.01); H02M 7/4815 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An inverter comprising:
an input configured to be coupled to a DC source and to receive input DC power from the DC source;
an output configured to be coupled to a load and to provide output AC power to the load;
a plurality of DC rails coupled to the input and configured to receive the input DC power from the DC source, the plurality of DC rails including a first DC rail, a second DC rail, and a neutral rail;
a first midpoint;
a second midpoint;
a third midpoint;
a plurality of switches coupled between the plurality of DC rails and configured to convert the input DC power into the output AC power, each switch of the plurality of switches having a parasitic capacitance, the plurality of switches including
a first switch coupled between the first DC rail and the first midpoint,
a second switch coupled between the first midpoint and the neutral rail,
a third switch coupled between the neutral rail and the second midpoint,
a fourth switch coupled between the second midpoint and the second DC rail,
a fifth switch coupled between the first midpoint and the third midpoint, and
a sixth switch coupled between the second midpoint and the third midpoint; and
at least one zero-voltage switching (ZVS) network coupled across at least two switches of the plurality of switches, the at least one ZVS network including at least two inductors configured to resonate with the parasitic capacitance of at least one switch of the plurality of switches to provide soft switching of at least one switch of the plurality of switches.