Working Principle - gala gar SMART 200 TIG PULSE Manual Técnico De Instrucciones

1. SUMMARY.
SMART 200 TIG PULSE welding machine is an excellent DC pulsed TIG arc welder which adopts the latest pulse width
modulation (PWM) technology and insulated gate bipolar transistor (IGBT) inverter technology, which can realize TIG
operation 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 and etc.
SMART 200 TIG PULSE welding machine has good performance: constant current output, fast response, HF striking
arc, and the welding current can be adjusted steplessly and pre-set (The method of lifting arc can reduce the waste of
tungsten electrode. Meanwhile, the welder has the function of long and short welding, current up/down-slope, and
short-circuit protection etc.).
SMART 200 TIG PULSE welding machines also have automatic protection functions with intelligent to 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 itself and prolong the equipment using
life.
SMART 200 TIG PULSE welding machine has MMA operation with hot start and arc force function. They are suitable
for all positions welding for various plates made of stainless steel, carbon steel, alloyed steel, titanium, etc, which is
also applied to pipe installment, mould mend, petrochemical, architecture decoration, car repair, bicycle, handicraft
and common manufacture
SMART 200 TIG PULSE Characteristics:
•
DC Pulsed TIG and MMA, adopt IGBT and advanced PWM technology ;
•
High performance MCU, digital control, digital display;
•
Preset all parameters with hold function;
•
More simple and intuitionistic parameter adjustment;
•
HF ignition, current down slope and up slope, gas pre-flow and post-flow;
•
Intelligent protection: over-voltage, low-voltage, over-current, over-heat ;
•
Wider voltage flexibility (220V±10%).
TIG - Tungsten Inert Gas welding
MMA - Manual Metal Arc welding;
PWM - Pulse Width Modulation
IGBT - Insulated Gate Bipolar Transistor

1.1. Working Principle

The working principle of SMART 200 TIG PULSE welding machines is shown as the following figure. Single phase
work frequency AC 220V or 230V (50 Hz) is rectified into DC (about 300V), then is converted to medium frequency
AC (about 20KHz) by inverter device (IGBT), after reducing voltage by medium transformer (the main transformer)
and rectifying 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 welding current parameter
can be adjusted continuously and steplessly to meet with the requirements of welding craft.
Single-phase AC
220/230V,50HZ
SMART 200 TIG PULSE
DC
Rectify Inverter
Medium Medium
AC AC
frequency frequency
transformer rectify
Current positive-
feedback control
DC DC
Hall device
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