Brief Description Of The Principle - ANDELI TIG Series Instruction Manual

Brief description of the principle

The schematic diagram of the TIG series welding machine is show figure 2：
Rectifier
The welding machine adopts IGBT high frequency inverter technology, power frequency
220V or 380V 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.
TIG-p series welding machine output characteristics such as shown in figure 3:
(3a)TIG welding output characteristics （3b)MMA welding output characteristics
MMA/TIG welding output characteristics：Drooping characteristics.
High
frequency
Figure Welding machine schematic
2）
（
High frequency
transformer
Control Circuit
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Rectifier filter