LOKERMANN GRAND MIG 200 MULTI PFC SYN MV, Руководство пользователя

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GRAND MIG
200 MULTI
PFC SYN MV
2.2 Working Principle
The working principle of MIG SERIES arc welding machine is shown as the following figure.
Single-phase 110V/220V work frequency AC is rectified into DC, then is converted to medium
frequency AC by inverter device (IGBT), after reducing voltage by medium transformer (the main
transformer) and rectifying by medium frequency rectifier (fast recovery diodes), and is outputted by
inductance filtering. The circuit adopts current feedback control technol ogy to insure current output
stably when MMA or TIG. And adopts voltage feedback control technology to insure voltage output
stably when MIG. Meanwhile, the welding current parameter can be adjusted continuously and
infinitely to meet with the requirements of welding craft.
2.3
Volt-Ampere Characteristic
MIG series welding machine has an excellent volt-ampere characteristic, whose graph is shown as
the following figure. The relation between the rated loading voltage U
2
and welding current I
2
is as
follows: U
2
=14+0.05I
2
(V)
Rectifier Inverter Transformer Rectifier
Current sensor
Current
Feedback
control
Single-phase AC
DC
AC DC
220V 50Hz
AC DC
Welding current
regulate
(Wire feed speed)
Wire feeder
motor
PWM signal
CPU control
Voltage
Feedback
control
110V/220V 50HZ
44
14
0 600 I
o
（
A
）
U
o
（
V
）
Working point
Volt-ampere characteristic
The relation between the rated loading
voltage and welding current
2.3 Volt-Ampere characteristic
MIG series welding machine has an excellent volt- ampere characteristic, whose graph is shown as
the following figure. The relation between the rated loading voltage U
2
and welding current I
2
is as
follows: U
2
=14+0.05I
2
(V)