| 摘要 |
PROBLEM TO BE SOLVED: To suppress a harmonic current when supplying power from an AC power supply to a power-converting device, in the power conversion device as a DC power supply with a regenerating function. SOLUTION: One terminal of a series circuit of a DC reactor 31 and a resistor 18 is connected to one terminal of the DC output of a circuit where semiconductor switches 11-16 are bridge-connected, a diode 20 is connected to both terminals of the series circuit, a thyristor 19 is connected to both terminals of the resistor 18, and an electrolytic capacitor 21 is connected between the other terminal of the series circuit and the other terminal of the DC output of a circuit being connected in a bridge, thus suppressing a harmonic current when power from the AC power supply 1 is to supplied a power conversion device 30 through the use of the DC reactor 31. |
