CPC H02M 3/24 (2013.01) [H02J 7/0013 (2013.01); H02J 2207/20 (2020.01)] | 21 Claims |
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.
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