AIRCUT
-101
I
,161
IW
,200
IW Inverter Plasma Cutting Machine
WARPP ENGINEERS PVT LTD
10
Protection grade
IP21S
Dimension mm
(L×W×H)
695×320×580
695×320×580
800×380×610
800×380× 810
NET WEIGHT
51kg
52kg
73kg
82kg
2
、
Plasma gas condition
Gas pressure range
：
0.5MPa
～
0.7MPa
Gas supply pipe compression strength
：
≥1MPa
Gas supply pipe inner dimension
：
≥Φ8
Gas flow
：
≥180L/min
Filter the water in the gas, then feed into the plasma
3
、
External characteristic curve
U
315V
285V
100A 120A
160A
I
200A
System instruction
Working principles
The control circuit of this cutting machine adopts advanced electronic part IGBT
as the main inverter switch component. Three-phase AC power is converted to
20KHz high-frequency DC current after being rectified by three phase rectifier. Then
under the function of IGBT inverter the DC current is inverted to AC high frequency
current, which is inverted to DC current after experiencing voltage reduction in high
frequency transformer, current rectifying in fast recovery diode. This DC current is
filtered through reactor, and the output cutting current is obtained. Control circuit
can control output current by controlling driven pulse width. The real time cutting
current, which is obtained through current sensor connected to output terminal in
series, is used as negative feedback control signal. After comparing with current
adjusting signal, the negative control signal is sent to PWM adjusting integrated
circuit, then a controlled driving pulse is output to control IGBT. Thereby a constant
output current can be maintained, and a steep dropping & constant current external
characteristic is obtained. Striking arc adopts high-frequency striking model. The
main circuit refers to appendix figure, and principle diagram of control circuit is
160A/144V
200A/160V
100A/120V
120A/128V
