US 11,811,297 B2
Phase-shift control method for power module, three-phase power module, and power system
Hong Liu, Shanghai (CN); Jie Kong, Shanghai (CN); Wen Zhang, Shanghai (CN); Baihui Song, Shanghai (CN); Cheng Lu, Shanghai (CN); and Hongyang Wu, Shanghai (CN)
Assigned to DELTA ELECTRONICS (SHANGHAI) CO., LTD., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Apr. 11, 2022, as Appl. No. 17/658,656.
Claims priority of application No. 202110529768.8 (CN), filed on May 14, 2021.
Prior Publication US 2022/0368235 A1, Nov. 17, 2022
Int. Cl. H02M 3/24 (2006.01); H02J 7/00 (2006.01)
CPC H02M 3/24 (2013.01) [H02J 7/0013 (2013.01); H02J 2207/20 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A phase-shift control method for a power module, wherein the power module comprises N inverter units outputting N AC voltages and being coupled to N high-frequency AC terminals respectively, N being a positive integer equal to or greater than 3 and the N high-frequency AC terminals being cascaded and connected to a post-stage rectifier circuit, the phase-shift control method comprises:
setting at least two phase-shift sequences, wherein phase sequence numbers of the N AC voltages of the N inverter units are different in the at least two phase-shift sequences;
in one switching period, controlling the N AC voltages of the N inverter units to phase shift a first angle with each other according to a first phase-shift sequence of the at least two phase-shift sequences; and
in another switching period, controlling the N AC voltages of the N inverter units to phase shift the first angle with each other according to a second phase-shift sequence of the at least two phase-shift sequences.