钢筋对焊机是混凝土制品工厂常用的一种焊接设备。其电源装置很简单:工频380伏线电压经一机械触点的控制,对十几千伏安乃至数十千伏安容量的焊接变压器供电,便可获得低压大电流焊接电源。由于装置极其简单,可霏,一直为人们所沿用。但是,这种电源装置的控制方法也有一些不容忽视的缺点:1、对焊机变压 Reinforced butt welders are commonly used welding equipment for concrete products factories. Its power supply unit is very simple: The power frequency of 380 volts line voltage is controlled by a mechanical contact, and it supplies power to a welding transformer with a capacity of more than ten kVA and even several tens of kilovolt, and a low voltage and high current welding power source can be obtained. Because the device is extremely simple, it can be used for people. However, there are some disadvantages that can’t be ignored in this control method of the power supply device: 1. Transformer pressure change