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我们设计了一种电焊机无载自停节电器。该节电器经过半年的频繁使用,效果良好。起弧容易,与未装该节电器前一样容易起弧;工作可靠,能在电源电压幅度变化较大的情况下正常使用。工作原理见图,当A、B两端送入380伏交流电压后,交流接触器CJ吸合,其常开触头CJ_1闭合,电焊机BH直接接入380伏电源,电焊机次级(c、d两端)便产生60伏左右的电压(有效值)。此电压经二极管D_1整流、电容器C_2滤波后,通过电阻R_1加至由稳压管DW_1～DW_5及二极管D_2、D_3等串联组成的
We designed a kind of welding machine without load from the stop electrical appliances. The Power Saver after six months of frequent use, the effect is good. It is easy to arcing, it is as easy to arcing as before the power saver is installed. It works reliably and can be used normally when the amplitude of power voltage varies greatly. Working principle shown in Figure, when the A, B into the 380V AC voltage at both ends, the AC contactor CJ pull the normally open contact CJ_1 closed, the welding machine BH direct access 380V power supply, welding machine secondary (c , D ends) will produce about 60 volts (RMS). This voltage is rectified by diode D_1, filtered by capacitor C_2 and then added to series-connected transistors Zener diodes DW_1 ~ DW_5 and diodes D_2, D_3 through resistor R_1