STEALTH DIGI-CUT 100 CNC
6
2 TECHNICAL INFORMATION
2.1 Main circuit functions
The working principle of DIGI-CUT 100 CNC 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 20 KHz) by the
inverter device (discrete IGBT). The voltage is reduced via the medium transformer and
rectified by the medium frequency rectifier (fast recovery diode) then outputted by
inductance filtering. The circuit adopts current feedback control technology to ensure
the current output is stable. The cutting current parameter can be adjusted
continuously to meet with the requirements of cutting.
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§2 Technology Parameters
2.1 Working principle of main circuit
The working principle of CUT 100 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 20 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 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
2.2 Parameters:
Table2.1 Technical parameters
Models
Parameters
CUT 80 CNC
CUT 100 CNC
Rated input voltage
（
V
）
3-380/400/440V±10% 3-380/400/440V±10%
Fre.
（
HZ
）
50/60
50/60
Rated input current
（
A
）
20
28
Rated input power
（
KW
）
11
14.5
Cutting current adjustment range
（
A
）
20
～
80
20
～
100
No-load voltage(V)
400
420
Duty cycle
（
40
�
10minutes
）
100% 80A 110V
100% 100A 125V
Severance Cut for Carbon Steel
（
mm
）
≤
45
≤
60
Optimal cutting thickness (mm)
Carbon steel
≤
30
≤
45
Stainless steel
≤
30
≤
45
Aluminum
≤
25
≤
36
Cooper
≤
15
≤
20
Dimensions
（
mm
）
630*240*445
630*240*445
Fig. 2.1 Working principle diagram
