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Design and construct of a variable 250-Amp electric arc welding machine

 Department: Electrical Electronics Engineering  
 By: usericon juliusmjoshua  

 Project ID: 6780
   Rating:  (5.0) votes: 1
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   Price:₦3000
Abstract
The machine is designed to serve with an output of 250A. It has two parts 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 a 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 limbs of the laminated core. The voltage from primary turns flows to the secondary turn by induction. The machine contains 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 looking at 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 are 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. ...
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