Basic Info.

Model NO.

TIG-160/200/250P

Model NO.

TIG-160/200/250P

Product Desciption

Brief Introduction

TIG-160/200/250 welding machine adopts the latest pulse width modulation (PWM) technology
and insulated gate bipolar transistor (IGBT) power module, which can 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.
The parameters of TIG-160/200/250 on the front panel all can be adjusted continuously and
steplessly, such as start current, crater arc current, welding current, base current, duty ratio, upslope time,
downslope time, pre-gas, post-gas, pulse frequency, AC frequency, balance, hot start, arc force and arc
length etc. When welding, it takes high frequency and high voltage for arc igniting to ensure the success
ratio of igniting arc.

TIG Characteristics

1. MCU control system , responds immediately to any changes.
2. High frequency and high voltage for arc igniting to ensure the success ratio of igniting arc, the reverse polarity ignition ensures good ignition behaviour in TIG-AC welding.
3. Avoid AC arc-break with special means, even if arc-break occurs the HF will keep the arc stable.
4. Pedal control the welding current.
5. TIG/DC operation,If the tungesten electrode touches the workpiece when welding, the current will drop to short-circuit current to protect tungsten.
6. Intelligent protection: over-voltage, over-current, over-heat, when the problems listed before occurred, the alarm lamp on the front panel will be on and the output current will be cut off.
It can self-protect and prolong the using life.
7. Double purposes : AC inverter TIG/MMA and DC inverter TIG/MMA, Excellent performance on Al-alloy ,carbon steel ,stainless steel ,titanium.

According to choosing the front panel functions, the following six welding ways can be realized.
DC MMA
DC TIG
DC Pulse TIG
AC MMA
AC TIG
AC Pulse TIG

Working Principle

The working principle of TIG welding machines is shown as the following figure. Single-phase 220V work frequency AC is rectified into DC (about 312V), then is converted to medium frequency AC (about 20KHz) by inverter device (IGBT module), after reducing voltage by medium transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diodes), then is outputted DC or AC by selecting IGBT module. 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.



Volt-Ampere Characteristic

TIG160/200 welding machine has an excellent volt-ampere characteristic, whose graph is shown as the following figure. The relation between the conventional rated loading voltage U 2 and the conventional welding current I 2 is as follows:
When I 2 ≤600A,U 2 =10+0.04I 2 (V); When I 2 >600A,U 2 =34(V).


Parameters



 Electrical principle drawing