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Control Circuit
High
frequency
High
frequency
transformer
Rectifier
Rectifier filter
Brief description of the principle
The schematic diagram of the MIG series welding machine is show figure 2
：
（
Figure 2
）
MIG series welding machine schematic
The welding machine adopts IGBT high frequency inverter technology, power
frequency 220V power input
，
direct rectification and then sent to the inverter
composed of IGBT and other components to become high frequency alternating
current, high frequency alternating current obtained after inverter is passed through
high frequency transformer after the step-down,high frequency rectifier rectifies
and filters, the output is suitable for the DC current of the welding. Through this
process, the dynamic response of the welder is improved, the volume and weight
of the transformer and the reactor are reduced, and the efficiency of the whole
machine is improved.
The design of the control circuit enables the welder to always achieve good
welding process performance when external conditions change(such as grid
voltage fluctuations and different output cable lengths).It is easy to arc,the are is
stable,the weld is well formed,and the welding current can be continuously
adjusted.
The output characteristics of the MIG series welder are shown in Figure 3
（
3a
）
MIG welding output characteristics
（
3b
）
MMA welding output characteristics
14
U=14+0.05I
Summary of Contents for MIG-270E
Page 1: ...USER S MANUAL MIG 270E ...
