What are the working principals of MFDC resistance welding transformers?

What are the working principals of MFDC resistance welding transformers?

MFDC stands for “Mid Frequency Direct Current”. The output could be direct current at 400-4000 hertz frequency. The input in North America is 60 hertz AC. A combination of control and transformer changes allow for the conversion of the current from AC to DC at the higher frequency. This is explained in another article in this blog:

WHY or HOW DO MFDC CONTROLS CHANGE CURRENT FROM AC TO DC TO AC TO DC?

The use of an MFDC transformer offers many advantages which has made its use very popular in the automation applications. This is discussed in the following article:

COMPARE MFDC VS AC IN RESISTANCE WELDING?

Eight millisecond DC pulse

 MFDC is found in most new automation applications. AC continues to have applications in the area of job shops and general applications.

References: Entron Controls

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