Taurus TIG200ACDC-HF-P - Working Principle

SUMMARY
and cuprum. Applications include pipe installation, mould mending, petrochemical industries,
architectural decoration, vehicle repairs, handicraft and general.
MMA - Manual Metal Arc welding.
PWM - Pulse-Width Modulation.
IGBT - Insulation Gate Bipolar Transistor
TIG - Tungsten Insert Gas welding
2.2 Working Principle
The operating principle of the Taurus TIG200ACDC-HF-P welding machines is depicted in the
following figure. Single-phase 220V inlet AC frequency is rectified to DC (approximately 321V), then
converted to a medium AC frequency (approximately 20KHz) by an inverter device (IGBT module).
After voltage reduction by the main medium transformer and rectified by a medium frequency rectifier
(fast recovery diodes), the output to AC or DC is selected by an IGBT module. The circuit employs
current feedback control technology to ensure current output stability. In addition, the welding current
parameters can be adjusted continuously to meet the welding requirements.
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