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目前,许多地方和单位研制了焊机空载自动投切装置,在一定条件下对节能有一些效果。它们的基本原理见图1。生产设备由焊机1、焊条2、工件3组成;控制装置由测量元件4、自动控制装置5、接触器开关6组成。测量元件通过测定空载电压判断焊条是否离开了工件,然后通过自动控制装置断开接触器线圈,焊机自动脱离电网,节约空载损耗;反之,焊条一碰工件,接触器自动带电,投入焊机。因此,国务院在
At present, many places and units have developed a welding machine automatic loading and unloading devices, under certain conditions, there are some effects on energy saving. Their basic principles are shown in Figure 1. Production equipment by the welding machine 1, electrode 2, the workpiece 3 components; control device consists of measuring element 4, automatic control device 5, contactor switch 6 composition. The measuring element determines whether the electrode has left the workpiece by measuring the no-load voltage, and then disconnects the contactor coil through the automatic control device. The welder automatically disengages from the power grid to save no-load loss. On the contrary, when the electrode touches the workpiece and the contactor automatically charges, machine. Therefore, the State Council is here