US 12,316,211 B2
Synchronized multi-inverter system with reduced ripple current in DC link
Minyu Cai, Roseville, MN (US); Akm Arafat, Blaine, MN (US); Bradford K. Palmer, Ham Lake, MN (US); and Dakshina S. Murthy-Bellur, Plymouth, MN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 18/016,178
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Jul. 8, 2021, PCT No. PCT/US2021/040911
§ 371(c)(1), (2) Date Jan. 13, 2023,
PCT Pub. No. WO2022/015575, PCT Pub. Date Jan. 20, 2022.
Claims priority of provisional application 63/053,127, filed on Jul. 17, 2020.
Prior Publication US 2023/0253873 A1, Aug. 10, 2023
Int. Cl. H02P 1/00 (2006.01); B60L 15/08 (2006.01); B60L 53/20 (2019.01); H02M 1/14 (2006.01); H02M 7/5395 (2006.01); H02P 1/28 (2006.01); H02P 3/00 (2006.01); H02P 5/74 (2006.01); H02P 7/06 (2006.01)
CPC H02M 1/14 (2013.01) [B60L 15/08 (2013.01); B60L 53/20 (2019.02); H02M 7/5395 (2013.01); H02P 5/74 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inverter system comprising:
a direct-current (DC) voltage supply electrically coupled with a DC link;
a plurality of inverters, each electrically coupled with the DC link;
a plurality of electric machines, each electrically coupled with a corresponding one of the inverters; and
a controller coupled with each of the inverters and operative to control carrier signals of the inverters such that the carrier signals are synchronized and interleaved at an angle (θ) that is determined based on a waveform type of the carrier signals and a number of the plurality of inverters.