简单的工作原理及框图此稳压电源是由50赫芝、220伏直接供电,经桥式高压整流平滑滤波后得一直流为300伏左右的电压,加到半桥式直流变换器上。用脉宽调制器发出的信号去驱动大功率晶体管T_1、T_2,使其交替导通与截止,在变换器的原副边就得到交变电压,副边的交变电压经全波整流滤波后就得所需的直流输出电压。此输出电压负反馈到脉宽调制器输入,控制脉宽调制器的输出脉冲宽度。输出电压降 Simple working principle and block diagram This power supply is regulated by 50 Hertz, 220 V direct power supply, the bridge has been smoothing high-voltage filtered smooth flow has been about 300 volts of voltage, added to the half-bridge DC converter. The signal sent by the pulse width modulator drives the high-power transistors T_1 and T_2 to turn on and off alternately. The alternating voltage is obtained on the primary and secondary sides of the converter. The alternating voltage on the secondary side is filtered by the full-wave rectification Have the required DC output voltage. This output voltage is negatively fed back to the PWM input to control the PWM output pulse width. Output voltage drop