Page 48 - CITS - Welder - Trade Theory

WELDER - CITS

Working principle of rectifier welding machine
The output of the step down transformer is connected to the rectifier unit.
The DC output is connected to positive to negative terminal from where it is taken for welding purposes. It can be
designed to provide either AC or DC welding supply by operating a switch provided on the machine.

Introduction to inverters welding machine
It is a new type of welding power source.

It taken AC input to the machine and convert it to DC.
This is done with a rectifier.
It is converted back to DC but at a higher frequency.
It now allows us to use a smaller transformer; this is accomplished with the inverter.

The power is now rectified back to DC for welding. Inverter power sources are smaller than conventional power
sources. But amperage range increases the efficiency of other welding machine.
For this reason it is very convenient for the welder.
And gives stability to his magnetic field. Inverter welding machine provide the current for shielded metal arc
welding, Gas tungsten arc welding (TIG), Gas metal arc Gas metal arc welding (MIG), plasma arc cutting. They
are used in all of these.

Inverter welding machine are light in weight and can be carried anywhere.

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CITS : C G & M - Welder - Lesson 8&9