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Characteristics of intermediate frequency DC welder generator
Oct 27, 2018

1. The welding current of intermediate frequency welding machine is close to full DC. Because there is no obvious peak current, the size of nugget enlarges steadily, almost no spatter, and the welding quality is stable and the thermal efficiency is high. Compared with power frequency welding machine, the welding current of intermediate frequency inverter welding machine can be reduced by 40%, and the service life of electrode can be prolonged greatly.

2. The transformer of intermediate frequency welding machine is small in weight and volume, low in input power, so it is easy to adopt connecting transformer welding clamp. When used in robot spot welding operation, the load of the robot can be reduced, while the power frequency welding machine needs a robot with stronger load capacity when used on the automatic line.

3. The response speed of the intermediate frequency spot welding machine is only 1/20 of that of the power frequency welding machine. The current can reach the set value more quickly, the parameters can be analyzed more accurately, and the welding quality control is more accurate.

4. The intermediate frequency spot welding machine has three phases load balance, high power factor (around 0.9), and energy saving. The two-phase power frequency welding machine is difficult to ensure the balance between the phase voltage, low power factor (about 0.6), three-phase power frequency welding machine is difficult to achieve constant current output.

5. Medium frequency spot welding machine is suitable for welding various materials and dissimilar metals, such as aluminum alloy, stainless steel, high strength steel plate and other materials. In addition, the welding quality of galvanized plate and common multilayer plate is much higher than that of power frequency welding machine. The power frequency welder is only suitable for materials with good welding performance, such as low carbon steel plates.








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