Brief Introduction; Technical Data; Working Principle - Telwin HF Serie Manuel D'instructions Et D'entretien

3.0 BRIEF INTRODUCTION

Your welding machine is an excellent DC pul-
sed TIG arc welder which adopts the latest
pulse width modulation (PWM) technology
and insulated gate bipolar transistor (IGBT)
inverter technology. It can realize TIG opera-
tion and change work frequency to medium
frequency so as to replace the traditional
hulking work frequency transformer with
the cabinet medium frequency transformer.
Thus, it is characterized with portable, small
size, light weight, low consumption etc.
This welding machine has good performan-
ce: constant current output, fast response,
HF striking arc, and the welding current can
be adjusted steplessly and pre-set. The wel-
der has the function of current down-slope
and arc force.
It also has automatic protection functions:
over-voltage, less-voltage, over-current, and
over-heat. If any one of the above problems
happens, the alarm lamp on the front panel
will be lighted and output current will be shut
off automatically to protect the unit itself and
prolong the using life.
It has MMA operation with arc force function.
Main Characteristics:
• DC TIG and MMA, adopt IGBT and
advanced PWM technology ;
• High performance MCU;
• Preset all parameters;
• More simple and intuitive parameter
adjustment;
• HF ignition, current down slope, gas
pre-flow and post-flow;
• Intelligent protection: over-voltage,
low-voltage, over-current, over-heat ;
Single Phase AC
Current
Rectifier
230V 50Hz
DC AC
Inverter
• Wider voltage flexibility (220V±10%).
• TIG - Tungsten Inert Gas welding;
• MMA——Manual Metal Arc welding;
• PWM——Pulse Width Modulation;
• IGBT——Insulated Gate Bipolar Tran-
sistor;

3.1 TECHNICAL DATA

NOTE: here below data may differ from
the data on the technical table on the unit.
Always refer to the technical data table on
the unit.

3.2 WORKING PRINCIPLE

(1 ph)
V
Uo
A ±10%
Amp. Min-Max
A
Amp. 60974-1
mm
Ø E
-
Insulation
-
Protec. Degree
The working principle of your welding machi-
ne is shown as the following figure. Single
phase work frequency AC 230V (50 Hz) is
rectified into DC (about 300V), then is conver-
ted to medium frequency AC (about 20KHz)
by inverter device (IGBT). The medium fre-
quency voltage is reduced by a transformer
(the main transformer) and rectified by a me-
dium frequency rectifier (fast recovery diode).
Voltage is then filtered by an output inductan-
ce. The circuit adopts current feedback con-
trol technology to insure current output stably.
AC
Medium Medium
Frequency Frequency
Transformer Rectifier
Current Feedback
Control
TECH SPECIFICATIONS
230V 50/60Hz
65
5 ÷ 160 MMA
5 ÷ 160 TIG
35% 160 MMA
60% 122 MMA
60% 160 TIG
1,6 ÷ 4
H
IP22S
DC DC
Output Induc-
tance and Hall
Probe
7