Stealth DIGI-CUT 60-1, Operator'S Manual, Page: 6 / 16

STEALTH DIGI-CUT 60-1
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2. TECHNICAL INFORMATION
2.1 Main circuit functions
The working principle of DIGI-CUT 60 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 60-1 Air Plasma Cutting Machine is shown as the following figure. Single-phase
220V work frequency AC is rectified into DC (about 312V), then it is converted to medium frequency AC (about
40KHz) 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 60-1
Rated input voltage
（
V
）
1-220/230/240V±10%
，
50/60Hz
Rated input current
（
A
）
41
Rated input power
（
KW
）
7.1
Cutting current adjustment range
（
A
）
20
～
60
No-load voltage (V) 400V
Duty cycle
（
40
�
10minutes
）
95% 60A
100% 58A
The max. cutting thickness to Carbon steel
（
mm
） ≤
35
Optimal cutting thickness (mm)
Carbon steel
≤
25
Stainless steel
≤
25
Aluminium
≤
20
Cuprum
≤
14
Dimensions
（
mm
）
640*240*445
Protection class IP23
Insulation class H
Net weight (kg)
）
23
Cooling method AF
Note:
The above parameters are subject to change with the improvement of machines.
Single-phase AC
220V 50HZ
Fig. 2.1 Working principle diagram