STEALTH DIGI-TIG 180 DC PULSE PFC MV
2.2 Module Explanation
The module explanation of arc welding machine must accord with the National
Standard GB10249, explained as follows (using the TIG 180 DC PULSE PFC MV as an
example).
TIG 180 DC PULSE PFC MV
2.3 Working Principle
The working principle of TIG DC PULSE PFC MV-series welding machines is shown
as follows: Single phases work frequency AC 110/220V(50 Hz) is transformed into
DC(155/312V), then is converted to medium frequency AC (about 50/40KHZ) by
inverter device (IGBT). After reducing voltage by medium transformer (the main
transformer) and rectifying by medium frequency rectifier (fast recovery diode), output
is produced by inductance filtering. The circuit adopts current feedback control
technology to ensure current output stability. Meanwhile, the welding current
parameter can be adjusted continuously and steplessly to meet with the requirements
of welding craft.
SUMMARY
7
sides and all position welding for pipe. 4) High frequency arc can make metal for microlite fabric,
eliminate blowhole and improve the mechanical performance of the joint. 5) High frequency arc is
suitable for high welding speed to improve the productivity.
TIG DC PULSE PFC MV-series welding machine 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
The module explanation of arc welding machine must accord with the correlative prescripts of
National Standard GB10249. It is explained as the following (take
TIG 180 DC PULSE PFC MV
as an
example).
TIG 180 DC PULSE PFC MV
Multi voltage
Power factor correction
PULSE
DC welding machine
Max welding current 180A
TIG welding machine/MMA
§2.3 Working Principle
The working principle of TIG DC PULSE PFC MV-series welding machines is shown as the
following figure. Single phases work frequency AC 110/220V(50 Hz) is rectified into DC(155/312V),
then is converted to medium frequency AC (about 50/40KHZ) 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
Multi voltage
Power factor correction
PULSE
DC welding machine
Max welding current 180A
TIG welding machine/MMA
SUMMARY
8
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.
§2.4 Volt-Ampere Characteristic
TIG DC PULSE PFC MV welding machine has an excellent volt-ampere characteristic, whose
graph is shown as the following figure. The relation between the conventional rated loading voltage U
2
and the conventional welding current I
2
is as follows:
When I
2
≤600A
，
U
2
=10+0.04I
2
(V); When I
2
＞
600A,U
2
=34(V).
67
34
10
0
600
I
2
（
A
）
U
2
（
V
）
Working
point
Volt-ampere characteristic
The relation between the
conventional loading
voltage and welding current
2.4 Volt-Ampere Characteristic
The TIG DC PULSE PFC MV welding machine has an excellent volt-ampere
characteristic, as shown as the following graph (see next page). The relation between
the conventional rated loading voltage U
2
and the conventional welding current I
2
is
as follows:
When I
2
≤
600A, U
2
=10+0.04I
2
(V); When I
2
>600A,U
2
=34(V).
9
