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这篇文章里介绍的交直流两用电源装置可以在任何中学裹进行制作;它可以用作物理实验室各种电压和必需强电流的交流和直流电源。如缐路图1所示,交直流两用电源装置是由热阴极充气管整流器,硒整流器,自耦变压器和降压变压器联接组成的。基本组成部分是有着适当数目分支的三个缐圈的变压器。照明系统的交流电通过插座和保险丝通到有着六个分支的变压器的第一组缐圈。藉助于电键Π_1可以选择第一组缐圈的圈数,以适应127或220伏特的干线电压。
The AC / DC dual-purpose power supply described in this article can be made in any secondary school; it can be used as a physical and laboratory AC and DC power source for a wide range of voltages and high currents. As shown in Figure 1, AC and DC power supply unit is composed of a hot cathode inflation tube rectifier, a selenium rectifier, an autotransformer and a step-down transformer. The basic component is a three-turn transformer with the appropriate number of branches. The lighting system’s AC power goes through the socket and the fuse to the first set of turns of a six-legged transformer. With the help of the key Π_1, the number of turns in the first group can be selected to adapt to the mains voltage of 127 or 220 volts.