The Design And Construction Of An Arc Welding Machine

Project and Seminar Material For Electrical Electronics Engineering EEE

Project and Seminar Material For Electrical Electronics Engineering EEE


Abstract


The machine is designed to serve with an output of 250A. it has two pats which are the primary and secondary parts. The primary part, through which voltage is supplied to the machine has 180 turns which is made of 2mm2 S.W.G 14 copper coil. The secondary part has 45 turns made of 4mm2 S.W.G 8 copper coil.

Both turns are wound on separate limb of the laminated core. The voltage from primary turns flows to the secondary turn by induction.

The machine contain a power switch through which the machine can be switched on or off when connected to the power source. The indication light simply shows when the machine is on or off which is equally controlled by the power switch.

The fan connected to the machine helps in the looking of the temperature of the machine, it gets started once the machine is on.

The welding current is adjusted by varying the spacing between the primary and secondary windings when the cranks is rotated, clockwise the insulating block between the two winding moves down, the magnetic flux leakage and the inductive impedance are increased, thereby reducing the welding current in the secondary windings. Also as the insulating block is moved upward, away between the two turns, the magnetic flux leakage and the inductive impedance are brought down, causing the welding current to rise.


Chapter One


1.0 Introduction

The Arc welding machine is the type that uses an electric power as an input, which is being supplied through the primary and then transferred to the secondary winding by induction which can the be used to carry out welding work by connecting to the output terminal the welding cables.

The output of the machine is designed in a way that it can be varied by adjusting the crank of the machines in clockwise or anti-clockwise direction in either to increase or decrease the output current respectively depending on the size of the material it is to be used on.


The Design And Construction Of An Arc Welding Machine


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