Patent ID: 8755163

Claim:
A three-phase AC power controller having three strands, with each strand having an input and an output, the AC power controller comprising: a first pair of antiparallel-connected valves connected between the input of a first strand and the output of the first strand, a second pair of antiparallel-connected valves connected between the input of a second strand and the output of the second strand, a third pair of antiparallel-connected valves connected between the input of the second strand and the output of a third strand, a fourth pair of antiparallel-connected valves connected between the input of the third strand and the output of the second strand, a fifth pair of antiparallel-connected valves connected between the input of the third strand and the output of a third strand, first RC half-branches connected as a snubber circuit to respective inputs of the three strands in one-to-one correspondence, and second RC half-branches connected as a snubber circuit to respective outputs of the three strands in one-to-one correspondence, wherein terminals of the first and second RC half-branches that are not connected to the respective inputs and outputs of the three strands are interconnected via a transverse connection.