(EN)
The present invention provides a power supply having a variable output voltage that makes it possible to suppress higher harmonics, while maintaining high power factor using a simple structure. This power supply is provided with an AC power supply 1; a bridge rectifying circuit configured with four diodes 2 to 5 for full-wave rectification of the alternating current from the AC power supply 1; a reactor 8 connected between the AC power supply 1 and an AC input 6a of the bridge rectifying circuit; a capacitor 10 connected between an AC input 6b and a DC output 6d; a smoothing capacitor 7; a zero-cross detection means 12; a two-way switch drive signal generating means 13; and a two-way switch drive means 14.
(ZH) 本发明提供以简单构造能够维持高功率因数并且能够抑制高次谐波且输出电压可变的电源装置。它具有:交流电源(1);对于从交流电源(1)输出的交流电进行全波整流且由4个二极管(2~5)形成的桥式整流电路(6);连接在交流电源(1)与桥式整流电路的交流输入端(6a)之间的电抗器(8);通过双向开关(9)连接在交流输入端(6b)与直流输出端(6d)之间的电容(10);滤波电容(7);过零点检测部(12);双向开关驱动信号生成部(13);双向开关驱动部(14)。