晶体管开关式直流稳压电源开关原理分析

直流稳压电源是整机不可缺少的部分．改变传统的变压整流稳压的程式，采用开关电源，用脉冲变压器高频传输能量，能提高功效，提高电源性能．可做到交流市电在１４０Ｖ～２８０Ｖ之间波动都能得到性能良好的稳定直流输出．实现整机无电源变压器且底板不带电．

Switch DC Regulated Power Supply of Transistors

DC regulated power supply is the necessary pert of any electronic instrument.The authorchanges the traditional method of abtaining DC voltage and adopts the switch power supply in whichthe energy is transmitted by a pulse transformer at higher frequencies. Thus, the efffeciency andproperty of the power supply is much higher than that of the traditional one.A stable output can beachieved even though the AC power voltage varies in the range of 140 V～280 V. Furthermore, nopower transformers are needed and,at the same time, the ha award of the instrument is not alive.