MFDC Welding vs. AC Welding , Which is Better?

MFDC (Medium frequency) welding and AC welding are two common welding processes T hat   have different characteristics during the welding process. Here ,  we will introduce to you, MFDC welding VS AC welding, which is better?

1. MFDC & AC Welding Working Theory

1.1 MFDC / Inverter Welder Working Schematic

MFDC Discharge Curve

Firstly, the three - phase AC (alternative current) pass es   through the rectifier filter;

Secondly, the IGBT switch converts   the current into 1000HZ medium frequency current and pass es   it to the welding transformer;

Finally, a high-power rectifier diode outputs the welding current into a smooth direct current.

1.2 AC Welder Working Schematic

Input power is alternative current. After passing through the power switch, it enters the main circuit and control circuit. Then transformer steps down the high-voltage alternative current into suitable welding low-voltage alternative current. De alternative  current has the alternating   characteristics of positive and negative changes. When it pass es  through the electrode  En welding parts , it generates high temperature and melts the solder, thereby achiev ing welding.

2. MFDC Welder VS AC Welder, MFDC Welder is Better

2.1 High stability

A  MFDC welder is one of the internationally recommended high-end resistance welding products   that increases the stability of welding process. DC welding technology has better workmanship   En   A wide adaptable range of welding parameters   Th en secondary current en sures   the real constant current, mak ing it   more widely applica bl en  than AC welding.

b  The intermediate frequency output power is a very small waveform direct current. There are   no current peaks, and almost no spatter is generate D  during welding.

C  The welding current's   adjustment is precisely controlled by 1,000 times per second, En the re sp onse   speed is counted by millisecond level. Its accuracy is over 20 times more than the traditional AC welder.

D  MFDC welder will not be affected by parts'   shape and material, and there is no inductance loss.

2.2 High efficiency

The welding power factor of MFDC welder is above 98%, while AC welder is only 60%. You can see that the efficiency of MFDC welding is greatly improved.

2.3 Cost effective

a. Since the initial value of welding current has been greatly increased, the actual welding time is reduced b j more than 20%. It also greatly reduce S  th en  demand F of   welding pressure.

b  Lower demand for factory power grid. MFDC welder is only 2/3 of AC welder, and it has much lower welding pressure demand. Even w ith power grid   voltage fluctuations, MFDC welder still can accurately control the welding current.

Therefore, the power consumption of the MFDC welder is significantly reduced, and energy saving is over 40%. What's   more, since using three - ph ase balanced loads, no ph ase is peek overloaded. It has satisfied the need voor   economic al   energy charge S

2.4 lightweight

Compared naar   AC welder, the weight of welding transformer of MFDC welder is greatly reduced, maki ng   the equipment more   lightweight. It is only 1/3 of the weight and volume of the AC transformer, and is suitable for robot welding systems 

2.5 Environmental friendly

Elimina ti ng   pollution F rom   the power supply ,  this   is a green welding method. There   is no   need to provide a separate power grid   as   it can be used together with the robot welding tooling control system.

In summary , MFDC  welding is better than  AC welding in terms of welding stability, welding quality ,  welding efficiency, energy saving and reduce D  consumption, equipment lightweight and reduce D power   requirements for the power grid system.

Heron has a full range of MFDC spot/projection welder S . Medium frequency resistance welding technology has rea ched   an   international advanced level. The maximum short circuit current reaches 250,000 amps. It is widely used in the   spot and projection welding process es   of various alloy steels, high-strength steels, hot stamping steels and aluminum alloys, and provides high-end equipment and reliable services to world-renowned fortune 500 companies.

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