ANDELI TIG-250PL ACDC Manual do operador - Página 10
Procurar online ou descarregar pdf Manual do operador para Inversor ANDELI TIG-250PL ACDC. ANDELI TIG-250PL ACDC 20 páginas. Inverter ac/dc pulsed tig welder
Imprimir página
2.3 Working Principle
The working principle of TIG-250PL 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 20KHz) 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.
Single-phase, AC
DC
Rectif
ier
220V，50Hz
2.4 Volt-Ampere Characteristic
TIG-250PL AC/DC 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
conventional welding current I
When I
≤600A，U
=10+0.04I
2
2
SUMMARY
Trans
AC
AC
Invert
Rectif
forme
er
ier
r
Current feedback
control
is as follows:
2
(V); When I
＞600A,U
2
2
8
Hall
DC
AC or DC
Invert
devic
er
Control signal
=34(V).
2
AC or DC
e
and the
2