SUMMARY
8
IGBT——Insulation Gate Bipolar Transistor
T
IG——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 200 AC/DC as an example).
§2.3 Working Principle
The working principle of TIG200E AC/DC welding machines is shown as the following figure.
Single-phase 220V work frequency AC is rectified into DC (about 312V), then is converted to medium
frequency AC (about 40KHz) by inverter device (IGBT module), after reducing voltage by medium
transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diodes),
then is outputted DC or AC by selecting IGBT module. 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.
Rectif
ier
Invert
er
Trans
forme
r
Rectif
ier
Hall
devic
e
Current feedback
control
Single-phase, AC
DC
AC
DC
220V
，
50Hz
AC
Invert
er
AC or DC
Control signal
AC or DC
