Arc welding machine is the type machine 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 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 major component of the machine that carry out such function is the transformer. This paper focuses on the design and construction of the welding machine transformer. The transformer is single phase which has shell type of lamination core and insulated windings of copper coils. In addition, the windings are given double insulation with the use of varnish solution which helps to prevent short-circuiting in the windings. With the help of Angle iron and lamination core, the core loss, iron loss in the machine is reduced to minimum. The voltage in (Vin) was determined directly from the mains of power supply and recorded. The voltage out (Vout) was recorded when the transformer was connected to the power supply at zero load while the scaling factor is the ratio of the output voltage and input voltage. The turn factor was also calculated to determine the relationship of the turn given to the transformer and the scaling factor. It was also observed that the scaling factor and the turn factor at terminal A is almost the same, this shows that the higher the turns the better the transformer to avoid high current which may cause spark and also improving the efficiency.
Primary Coil, SecordaryCoil, Current and Welding
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