ARC-E 400
2
Principle & Technical data
ARC-E series Block diagram of principle
Input 3-phase 380V/50Hz Output
Figure 1: Block diagram of principle
This series welding machines apply IGBT soft switch inverter technology. 3- phase 380V input volt
are
rectified by rectifier, inverted into HF AC, reduced by HF transformer, rectified and filtered by HF rectifier,
then output DC power suitable for welding. After this process, the welder’s dynamical responsive speed has
been greatly increased, so the
welder size and weight are reduced noticeably result in energy saving. Power
source enjoy sound anti-fluctuating ability and high-quality performance during external context changes
(As to fluctuation in input power supply and extended welding cables). Easy to arc start, stable arc length,
pretty weld formation and capability of continuous regulation of welding current and arc force current.
Inverter DC arc welding machines output characteristic curve is as follows:
Figure 2: Volt-Ampere curve
3 phase
Rectifier
HF
Inverter
HF
Transformer
Rectifier &
Filter
Control circuit
90
–
20
–
0
U
（
V
）
U=20+0.04I
I(A)
Imin
Imax
