amig AMIG-LST Series, Quick Instructions, Page: 9 / 37

6
1 - GENERAL REMARKS
1-1 Power source features
This series of power sources apply IGBT soft switch inverter technology. Its internal control system applies DSP which
ensures quick response to any change during the welding process so as to achieve precise control of welding process
and ensure optimal welding results. The strong ability of arc self-adjustment ensures a highly stable welding current
against grid fluctuation and arc length change to get optimal results.
This series has 3 core system, almost can communicate with all robots on market by digital /analogue interface. Perform
welding work easily.
Features and benefits:

High speed DSP+FPGA+MCU multi-core system, can shorten control period to control arc effectively;
 Periodic molten drop control technology, molten pool is more stable, with beautiful welding seam formation;

Welding spatter for carbon steel decreases 80%, reduce spatter clean work; heat input reduces 10%~20%, small
deformation;

With precise pulse waveform control technology, and lower heat input to avoid burn through and deformation, also
reduce 80% spatter, realize very thin plate low spatter welding. This technology is widely used in bicycle, fitness
equipment, automobile component, and furniture industries;

Built-in start point test function, can achieve welding seam start point test without adding robot hardware (Optional).
1-2 Functional principle
This series of power sources adopt IGBT soft switch inverter technology. 3-phase input voltage are rectified by rectifier,
inverted into HF AC, reduced by HF transformer, rectified and filtered by HF rectifier, chopped and then output DC power
suitable for welding. After this process, the welding machine dynamical responsive speed has been greatly increased, so
the size and weight are reduced noticeably result in energy saving. The control circuit's closed-loop control makes the
power source enjoy strong ability against power grid fluctuation and perfect welding performance. The schematic diagram
is as shown in Fig. 1-2-1:
Fig.1-2-1: Schematic diagram