US 12,191,758 B2
System and method for operating a three-phase inverter with four or more legs
Akm Arafat, Blaine, MN (US); Moinul S. Haque, Starkville, MS (US); Bradford K. Palmer, Ham Lake, MN (US); and Patrick Kaufman, Vacaville, CA (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 18/026,427
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Sep. 8, 2021, PCT No. PCT/US2021/049411
§ 371(c)(1), (2) Date Mar. 15, 2023,
PCT Pub. No. WO2022/060606, PCT Pub. Date Mar. 24, 2022.
Claims priority of provisional application 63/080,376, filed on Sep. 18, 2020.
Prior Publication US 2023/0387789 A1, Nov. 30, 2023
Int. Cl. H02P 21/22 (2016.01); B60L 50/60 (2019.01); H02M 1/32 (2007.01); H02M 7/5387 (2007.01); B60K 6/40 (2007.10)
CPC H02M 1/325 (2021.05) [B60L 50/60 (2019.02); H02M 1/327 (2021.05); H02M 7/53871 (2013.01); H02P 21/22 (2016.02); B60K 6/40 (2013.01); B60L 2210/40 (2013.01); B60Y 2200/92 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inverter system comprising:
a direct-current (DC) voltage supply;
an inverter electrically coupled with the DC voltage supply, the inverter comprising four or more legs, each leg including two switches operating complementary to each other;
an electric machine electrically coupled with the inverter; and
a controller coupled with the inverter and operative to determine which three of the four or more legs are selected to operate the inverter, the controller implementing a space vector pulse width modulation (SVPWM) strategy in which a remaining one of the four or more legs is connected to operate the inverter when a current switching state of the SVPWM strategy is in a first null vector state.