我们采用把控制晶体管接在交流电源测桥式整流器直流输出端进行电流负反馈控制的方式,研制成了供输出功率为2瓦的CO_2波导激光器使用的稳流电源.电源的原理电路和电压电流波形分别示于图1和图2.假设升压变压器SB为一理想变压器,漏感L_s为零,初级电感L_1为无穷大;次级负载折算到初级为一纯电阻R;注入晶体管BG基极的电流为一定值i_(bo)下面我们借助于图1(b)和图2定性分析一下晶体管BG的控制作用.由图1(b)可知,负载电流i_R We use the control transistor connected to the AC power bridge rectifier DC output negative current feedback control approach was developed for the output power of 2 watts CO_2 waveguide laser used by the steady flow power supply principle circuit and the voltage and current Waveforms are shown in Figure 1 and Figure 2. Assuming that the step-up transformer SB is an ideal transformer, the leakage inductance L_s is zero, the primary inductance L_1 is infinite, the secondary load is converted to a primary resistance R, and the base of the injection transistor BG The current is a certain value i_ (bo) Next we qualitatively analyze the control of the transistor BG by means of Figure 1 (b) and Figure 2. It can be seen from Figure 1 (b), the load current i_R