2 Technology Parameters
2.1 Working principle of main circuit
The working principle of ArcoCut 100i Air Plasma Cutting Machine is shown as the following figure.
Three-phase 380V work frequency AC is rectified into DC (about 530V), then it is converted to medium
frequency AC (about 40 KHz) by inverter device (discrete IGBT), after reducing voltage by medium
transformer (the main transformer) and rectified by medium frequency rectifier (fast recovery diode), and
is outputted by inductance filtering. The circuit adopts current feedback control technology to insure
current output stably. Meanwhile, the cutting current parameter can be adjusted continuously and
steplessly to meet with the requirements of the cutting craft.
Rectify
Inverter
Medium
frequency
transformer
Medium
frequency
rectify
Hall device
Current positive-
feedback control
Three-phase, AC
DC
AC
DC
380V
,
50Hz
AC
DC
fig 2.1 Working principle diagram
4
Summary of Contents for ARCOCUT G-100i
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