现介绍一种可使电焊机空载电流降低到原来1/20以下或更低的电焊机自动停机节电器。这种节电器线路简单,制作、调试方便,起弧容易,动作可靠,造价低。很适合小型厂、矿等单位自行制作、使用。工作原理由图1可知,当电焊机空载时,其初级线圈中电流急剧下降,当电流下阵列正常空载电流(即低于电 Is introduced to a no-load current can be reduced to less than the original 1/20 welding welder automatic shutdown Saver. This saver circuit is simple, easy to make and debug, easy to arcing, reliable operation and low cost. Very suitable for small factories, mines and other units to produce, use. Working principle As can be seen from Figure 1, when the welder is no load, the current in the primary coil drops sharply. When the current of the array is normal no-load current