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Voltage of medium frequency welder [DCS12]

Dec 27,2023

Normal electrical equipment requires that the voltage of the power supply does not vary with the load, and that the voltage is constant, such as 380V single-phase or 220V, although the voltage connected to the welding transformer is corresponding.

In the other case, the supply voltage is 380V or 220V, if the input voltage of such a transformer can vary with the output current (load) , and the voltage decreases rapidly as the load increases, this is called the dip feature of voltage, which involves the various voltage requirements required for a medium frequency welder.

1, Primary voltage

AC equipment usually connects to the grid at a single-phase voltage of 380V because the voltage at both ends of the transformer primary coil is specified as a single-phase 380V.

2, Zero Voltage

In order to ensure frequent short-circuit welding process, the provision of no-load voltage is about 60V - 80 V, which generates smooth arc, but also is safe for the operator.

3, No-load voltage

In order to meet the needs of arc ignition and safety, when no-load welding, the provision of no-load voltage is about 60V - 80V, which can start arc smoothly, but also ensure safe working.

4, Working voltage

After welding arc comes up, the specified voltage can be reduced to the required voltage of arc normal work, that is, the working voltage, about 20V - 4V. This voltage is also a safe voltage.

5, Arc voltage

Arc voltage is the voltage at both ends of the arc. This voltage is in the operating voltage range. During welding, the arc length will change. Longer arc length goes with higher arc voltage. Shorter arc length, arc voltage should be lower. Therefore, the arc welding transformer should be incorporated into the arc length changes to ensure that the arc is unchanged.

MFDC spot welder group HAIFEI