3
HF current through the rectify of the full bridge. While after the depression of the HF transformer, rectified by the FRD and
filtered by the reactor, the HF current will change to the low-voltage but high welding current.
The control circuit 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.
Force current function: the control circuit will increase the current when the welding voltage less than 15V, so that the
electrode will not stick with the work-piece to enlarge the arc penetration.
5.2
Welding machine output CC/CV feature diagram
5.3
Principal diagram
6
Delivery and storage
Keep the machine away from rain and snow, the temperature should be -25~+55
℃
.
