WARPP INARC 200 IDS, Руководство по эксплуатации

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2 SUMMARY
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2.1 Brief Introduction
This machine are general MMA arc welder which adopts the latest pulse width modulation (PWM)
technology and the insulated gate bipolar transistor (IGBT) power module. It can change work frequency
to medium frequency so as to replace the traditional hulking work frequency transformer with the cabinet
medium frequency transformer. Thus, it is characterized with portable, small size, low consumption and
etc.
This machine have excellent performances: constant current output makes welding arc more stable;
fast dynamic response speed reduces the impact from the arc length fluctuation to the current; accurate
stepless current adjustment and pre-setting function. There are also some automatic protection
functions for under voltage, over current, over heat, etc. inside the welders, when the problems listed
before occurred, the alarm on the front panel is light and at the same time the output current will be cut
off. It can self-protect and prolong the using life and greatly improved the reliability and practicability of
the welders.
This machine can also realize TIG operation. While MMA operation, if the electrode touches
workpiece over two seconds, the welding current will drop to the minimum current automatically to
protect the electrode. While TIG operation, the minimum current will be outputted firstly until the arc is
ignited by lifting method, the output current will rise to the preset value, which can protect the electrode.
At the same time, the arc force and hot start will be provided with MMA operation.
MMA --------- Manual Metal Arc welding
PWM ------------ Pulse
– Width Modulation
IGBT ------------- Insulation Gate Bipolar Transistor
TIG --------------- Tungsten Inert Gas welding
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2.2 Working Principle
The working principle of this machine is shown as the following figure. Single phase 220V/230V
±
10%
work frequency ( 50/60 HZ ) AC is rectified into DC (about 300V), then is converted to medium frequency
AC ( about 20KHz ) by inverter device ( IGBT module ), after reducing voltage by medium transformer
( the main transformer ) and rectified by medium frequency rectifier ( fast recovery diodes), 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.
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2.3 Volt-Ampere Characteristic
This machine have excellent volt-ampere characteristic, seeing the following graph. In MMA welding, the
relation between the rated loading voltage U2 and welding current I2 is as follows:
When I2=<600A, U2=20+0.04I2 (V); when I2 > 600A, U2=44 (V)