Ingress Protection
IP23
Dimension
(L*W*H)
460X270X390
Net Weight (KG)
24
INTIG 250 PULSE DC Pulse Argon Welding Machine
4.System description
a. Working principle
INTIG 250 PULSE series welding machine adopts IGBT as the main circuit switch. The three-
phase AC input power inverted to 20KHz mid-frequency current through the rectifier of the full
bridge. Then through the filter and current negative feedback control to get the constant
adjustable welding current.
The control circuit will control the output current through the adjusting of the pulse width. The
negative feedback signal, which is the real welding current get from the output current sensor,
put into the special PWM circuit after compared with the current adjust signal, then output the
driving pulse to control the IGBT, so that the output current will keep stable to get descending
external characteristic.
This machine has functions of gas pre send, gas post cut off, HF arc striking, current up-
slope, current down-slope. All these functions are controlled by the digital signal controller
automatically.
b. Working circuit diagram
