(EN)
Teh invention is to satisfy both high power factor and harmonics suppression by connecting a capacitor between the AC input terminal and DC output terminal of a bridge rectifier circuit. A power supply is provided with an AC power supply 6, a bridge rectifier circuit 5 formed of four diodes 1-4 for full-wave rectification of the AC voltage from the AC power supply 6, a reactor connected between the AC power supply 6 and an AC input terminal 5b, a capacitor 9 connected between an AC input terminal 5a and a DC output terminal 5c, and a smoothing capacitor 8. A resonance current flows through the reactor 7 and the capacitor 9 during half period of AC input to increase Vc from zero to Vo through the charging of the capacitor 9. The Vc decreases from Vo to zero during next half period of AC input through the discharge of the capacitor 9, and a smooth current of series resonance flows from zero phase of the input voltage.
(ZH) 通过将电容器连接在桥式整流电路的交流输入端和直流输出端之间，提供一种能兼顾高功率因数和抑制高次谐波两方面的电源装置。它有交流电源(6)、桥式整流电路(5)、连接在交流电源(6)和交流输入端(5b)之间的电抗器、连接在交流输入端(5a)和直流输出端(5c)之间的电容器(9)、以及平滑电容器(8)。有共振电流流过电抗器(7)及电容器(9)，电容器(9)充电，Vc从零上升到Vo，在交流输入的下半周期内，电容器(9)放电，Vc从Vo下降到零，能流过平滑电流。