Let us first talk about the circuit structure of the inverter welding machine, so that everyone has a more sober understanding: the inverter welding machine adopts the process of rectification-inversion-re-rectification, which is three aspects of AC-DC-AC. The development of the transformer welding machine is developed with the development of power switching devices, core materials, circuit topologies, and technology, along with the development of power switching devices. At present, there are static pressure tube inverter welding machines and high-power transistor reverse It is composed of variable welding machine and field effect transistor inverter welding machine.
The inverter welding machine requires a more complicated control circuit, which is very flexible in control. The diode rectifier welding machine circuit is very simple and reliable. The two need to be combined well. The main circuit is the rainbow three-phase transformer step-down, diode rectification, and For low-voltage DC, the output characteristics of the inverter welding machine are controlled by the DC chopper of the power switching device. Because there are not many circuit links, the reliability is very high and the power consumption is relatively large.