| 摘要 |
PURPOSE: To suppress the generation of harmonic waves and to improve the power factor by connecting first and second capacitors connected in series in parallel with a smoothing capacitor, connecting a resistor from the connecting point of the first and second capacitors to a power source, and specifying the values. CONSTITUTION: Capacitors C1, C2 are provided in parallel with a smoothing capacitor C0 , and the intermediate point of the diodes D2, D4 of a diode bridge is connected to the intermediate point of the capacitors C1, C2 via a resistor R. When the power consumption maximum value of a load side is Pmax , the power frequency of an AC power source is f and the effective value of the power voltage of the AC power source is Vin , the electrostatic capacities C1, C2 of the first and second capacitors are selected to 0.5×Pmax /(2×f×Vin <2> ) to 1.5×Pmax /(2×f×Fin <2> ) or preferably Pmax /(2×f×Vin <2> ), and the value of the resistor R is selected to 0.0001/Cl to 0.001/C2 or 0.0001/C2 to 0.001/C2 or preferably 0.0001/C1 to 0.0004/C1 or 0.0001/C2 to 0.0004/C2.
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