SUMMARY
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molten pool. The depth of penetration is even. Is suitable for welding all positions for pipe. 4) High
frequency arc can eliminate blowholes and improve the mechanical performance of the joint. 5) High
frequency arc is suitable for high welding speed to improve productivity.
ArcoTig HF200P is suitable for all positions welding for various plates made of stainless steel, carbon
steel, alloyed steel, titanium, magnesium, cuprum, etc, which is also applied to pipe installment, mould
mend, petrochemical, architecture decoration, car repair, bicycle, handicraft and common manufacture.
MMA——Manual Metal Arc welding
PWM——Pulse-Width Modulation
IGBT——Insulation Gate Bipolar Transistor
TIG——Tungsten Insert Gas welding
2.2 Module Explanation
HF= High Frequency
200- Amperage
P- Pulse modulation
2.3 Working Principle
The working principle of ArcoTig HF200P is shown as the following figure. Single phase work
frequency AC 110V/220V (50 Hz) is rectified into DC (about 380V), then is converted to medium
frequency AC (about 40KHz) by inverter device (IGBT), after reducing voltage by medium transformer
(the main transformer) and rectifying by medium frequency rectifier (fast recovery diode) and is
outputted by inductance filtering. The circuit adopts current feedback control technology to insure
current output stably. Meanwhile, the welding current parameter can be adjusted continuously and
steplessly to meet with the requirements of welding craft.