| 摘要 |
PURPOSE: To obtain an AC-DC conversion power-supply circuit which can increase the power factor of the power-supply line, which can reduce the harmonic current included in the rectified current and which can reduce the ripple voltage component contained in the output DC voltage. CONSTITUTION: A sine-wave voltage which is generated in a resonance capacitor 10 for high-frequency inverters 4 to 10 inside a DC-DC converter 30 is added to a rectified output voltage Vi from a bridge rectifier diode circuit 2, and the voltage is rectified again by a rectifier diode 25 which is installed newly so as to be smoothed by a smoothing capacitor 3. Thereby, the width of the rectified current before a smoothing operation is made large, the power factor can be increased, and the harmonic current contained in the rectified current can be reduced. |
