US 12,191,780 B2
Soft-switching current source inverters
Mickael J. Mauger, Atlanta, GA (US); Rajendra Prasad Kandula, Atlanta, GA (US); and Deepak M. Divan, Atlanta, GA (US)
Assigned to Georgia Tech Research Corporation, Atlanta, GA (US)
Appl. No. 17/753,290
Filed by Georgia Tech Research Corporation, Atlanta, GA (US)
PCT Filed Aug. 26, 2020, PCT No. PCT/US2020/047882
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/041465, PCT Pub. Date Mar. 4, 2021.
Claims priority of provisional application 62/891,791, filed on Aug. 26, 2019.
Prior Publication US 2024/0014749 A1, Jan. 11, 2024
Int. Cl. H02M 7/48 (2007.01); H02M 1/00 (2006.01); H02M 1/12 (2006.01); H02M 5/458 (2006.01); H02M 7/5387 (2007.01)
CPC H02M 7/4826 (2013.01) [H02M 1/0058 (2021.05); H02M 1/126 (2013.01); H02M 5/458 (2013.01); H02M 7/5387 (2013.01)] 37 Claims
OG exemplary drawing
 
15. A current source inverter (CSI) comprising:
a first CSI bridge operatively connected to a first power bank;
a second CSI bridge operatively connected to a second power bank;
a first DC-link inductor connected in series between the first and second CSI bridges;
a first resonant tank connected in parallel with the first CSI bridge;
a first leakage management diode connected in series with the first resonant tank;
a second resonant tank connected in parallel with the second CSI bridge; and
a second leakage management diode connected in series with the second resonant tank;
wherein the CSI is configured to operate in a switching cycle;
wherein the switching cycle comprises an active phase and a freewheeling phase;
wherein during at least a portion of the active phase, power is transferred simultaneously between:
the first power bank and the first DC-link inductor via the first CSI bridge; and
the second power bank and the first DC-link inductor via the second CSI bridge; and
wherein during the freewheeling phase, no power is transferred between the first DC-link inductor and the first and second power banks.