18
7, Working principle
7.1 Working principle
NB-500HK gas shield welding machine adopts the latest electron device----IGBT is the key
inverter device. The three phase AC power is transformer into 20KHz high frequency voltage
after bridge rectified. The high frequency voltage output welding voltage after transforming,
rectifying and filtering.
7.2 Drawing
Fig.8 Drawing
2.3
1
、
1.2
0
200
22
100
15
20
3.2
1.2
0
240
25
100
15
20