Power converter

A power converter comprising:

• a first DC terminal and a second DC terminal;
• a power converter circuit including a plurality of first switching elements and a plurality of second switching elements, the power converter circuit being implemented as a parallel connection of a plurality of switching circuits in each of which one of the plurality of first switching elements and a corresponding one of the plurality of second switching elements are connected one to one in series, the plurality of first switching elements being connected to the first DC terminal, the plurality of second switching elements being connected to the second DC terminal;
• a plurality of AC terminals provided one to one for the plurality of switching circuits, each of the plurality of AC terminals being connected to a connection node between the first switching element and the second switching element of a corresponding one of the plurality of switching circuits;
• a plurality of switches provided one to one for the plurality of switching circuits, each of the plurality of switches having a first end thereof connected to the connection node between the first switching element and the second switching element of a corresponding one of the plurality of switching circuits, the plurality of switches having their respective second ends connected in common to a common connection node;
• a plurality of resonant capacitors provided one to one for the plurality of switches, each of the plurality of resonant capacitors being connected between the first end of a corresponding one of the plurality of switches and the second DC terminal;
• a resonant inductor having a first end and a second end, the first end of the resonant inductor being connected to the common connection node;
• a regenerative capacitor having a third end and a fourth end, the third end of the regenerative capacitor being connected to either the first DC terminal or the second DC terminal;
• and
• a controller configured to apply a control signal, having a potential alternating between a high level and a low level, to each of the plurality of first switching elements, the plurality of second switching elements, and the plurality of switches,
• the controller being configured to, when determining that resonant currents passing respectively through two or more switches belonging to the plurality of switches be going to flow simultaneously through the resonant inductor, perform shift control of shifting a high-level period of a control signal for at least one switch out of the two or more switches to prevent the resonant currents passing respectively through the two or more switches from flowing simultaneously through the resonant inductor.