ON VIDEO How to turn a welder into a 250 V generator

 

How to turn a welder into a 250 V generator


The function of the current generator is to supply the electric arc present between the base material and the electrode with the output of an amount of current sufficient to keep it lit. Welding with electrode is based on the principle of constant current, that is to say that the current delivered by the generator must not vary when the operator moves the electrode in relation to the part.

 The construction characteristic of the source therefore makes it possible to maintain a stable current in the face of the variation in length of the arc due to the approach or the distance from the electrode: the more the current is constant, the more the arc is stable. , thus facilitating the task of the operator. Inside the generator is installed a welding current adjustment device of the mechanical type (magnetic shunt or saturable reactance), or electronic (SCR systems or inverter systems). This distinction makes it possible to divide electrode welders into three different families according to their construction technology: electromechanical welders, electronic welders (SCR), inverter welders.

The polarity of the generator output current also determines two additional categories:

a) AC alternating current generator
The current output from the generator assumes the typical form of a sine wave whose polarity changes at regular intervals, with a frequency ranging from 50 to 60 cycles per second (Hertz). The latter is obtained by means of a transformer making it possible to transform the mains current into an adequate welding current. Characteristic of electromechanical welding stations.

 

 

How to turn a welder into a 250 V generator


The function of the current generator is to supply the electric arc present between the base material and the electrode with the output of an amount of current sufficient to keep it lit. Welding with electrode is based on the principle of constant current, that is to say that the current delivered by the generator must not vary when the operator moves the electrode in relation to the part.

 The construction characteristic of the source therefore makes it possible to maintain a stable current in the face of the variation in length of the arc due to the approach or the distance from the electrode: the more the current is constant, the more the arc is stable. , thus facilitating the task of the operator. Inside the generator is installed a welding current adjustment device of the mechanical type (magnetic shunt or saturable reactance), or electronic (SCR systems or inverter systems). This distinction makes it possible to divide electrode welders into three different families according to their construction technology: electromechanical welders, electronic welders (SCR), inverter welders.

The polarity of the generator output current also determines two additional categories:

a) AC alternating current generator
The current output from the generator assumes the typical form of a sine wave whose polarity changes at regular intervals, with a frequency ranging from 50 to 60 cycles per second (Hertz). The latter is obtained by means of a transformer making it possible to transform the mains current into an adequate welding current. Characteristic of electromechanical welding stations.