DC Transformer Mf380 New Model for Welding Machine Transformer and Controller

Product Description

DC Transformer MF380 New Model For Welding Machine Transformer And Controller

Product Description

Brief introduction 

Medium-frequency (MF) transformers are a result of recent advances in resistance welding technology. 

They arepowered by a transistor inverter, supplying square wave AC 500 V @ 1000 Hz which is converted by the MF transformer to a low voltage high current AC.

This low voltage AC current is rectified to DC by a diode block built into the transformer.

The higher operating frequency of an MF system allows efficient energy conversion using a smaller and lighter transformer.

Other benefits with MF transformers used in portable and robotic welding guns are:

The reactance of the welding loop only limits the upslope and down slope of the welding current.

While the peak welding current in limited only by the welding loop's resistance. 

The net result is again smaller transformer, especially when welding with large throat, high-impedance guns.

MF welding is less demanding on the plant power system.

The MF inverter draws balanced line current from all 3 phases and operates at a high power factor (0.9).

With MF transformers the peak welding current almost equals its RMS value, which helps to obtain quality welds with no splash and constantstrength even at lower pressure.

The high frequency permits much faster - 1000 times per second - process control, which again results in better weld quality.
 

Application 

For all kinds of intermediate frequency, power frequency 

resistance welding machine.Such as automobile welding clamp,

seam welding machine, mesh welding machine and so on.

 

Product Parameters

 

Technical parameter
TYPE							MF380
Primary nominal voltage						V	500
Frequency						Hz	1000
Nominal power at 20%ED						kVA	380
Nominal power at 50%ED						kVA	188
Nominal power at 100%ED						kVA	117
Secondary  voltage						V	13
Permanent DC current 100%						A	15000
Short circuit current						KA	75
Turns ratio						N1 / N2	38:1
Weight						kg	58
Temperatur switch							2 x 150 °C, 1 x 70 °C  Temperature switch
Insulation class							F (155 °C)
Current measuring coil							--
Size						mm	160X1210X333
Cooling water < 30°C						L/ min	16×4
Pressure drop						Mpa	<0.1

 

Load diagram


 

 

Certifications

CE certificate

Company Certificate





 

Factory environment display