| 摘要 |
PROBLEM TO BE SOLVED: To reduce higher harmonic noise generated at the time of switching by making up an LC filter section with three single-phase reactors and three parallel capacitors and collectively connecting terminals of the parallel capacitors at the side opposite to AC lines to a P side or an N side of a parallel capacitor on a DC line. SOLUTION: For AC input lines, single-phase reactors 10-12 with one end connected to a middle connection point between semiconductor switches 1 and 2, 3 and 4, and 5 and 6 respectively are independently installed in series between the AC input lines. An LC filter section is made up with the three single-phase reactors 10-12 and three parallel capacitors 7-9. Terminals of the parallel capacitors 7-9 at the side opposite to the AC input lines are collectively connected to an N side or a P side of a parallel capacitor 13 on a DC output line. Due to this structure, higher harmonic noise generated at the time of switching can be reduced in a power converter circuit. |
