Redio
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Hello can anyone how to convert this transformer in a welder transformer
This discussion focuses on converting a transformer with a 220V input and a 140V output into a welder transformer. The participants highlight the importance of understanding the transformer’s coil configuration, noting that it has four blocks of coils, each rated at approximately 55V. By connecting three blocks in series and isolating the fourth, a secondary output of 73V can be achieved, though caution is advised due to the high voltage and potentially lower current. Suggestions include modifying the secondary winding to increase current and using a rheostat to adjust the output voltage.
PREREQUISITESElectronics enthusiasts, DIY welders, and anyone interested in modifying transformers for welding applications will benefit from this discussion.
Convert it to what?Redio said:Hello can anyone how to convert this transformer in a welder transformer
Thnx .my transformet is 220v input and 140 v out puAdiel Samson said:I have both practical and theoretical experience on welder stuff.. So I need to ask you some question about your present transformer
I have also putet a bridger rectifierRedio said:Thnx .my transformet is 220v input and 140 v out pu
On the contrary your transformer is 220/110 step down/step up. It has 4 block of coils.. Each with voltage rate of approximately 55V ... Therefore with this parameters you can only have secondary output of minimum 73V.. By taking 3 block and put them in series and also isolating the 4th coil connection to be the secondary... You will have 220V input 73V output and probably 20-30% duty cycle.. What can u weld with this high voltage of 73V care must be taking operating with such high voltage.. And remember the current might be lower than expected.. You can increase that by changing the secondary winding with a 2X size of the original coil and half the turns then you will get 2* your current and the voltage drod to half.(31.5V) thanksRedio said:Thnx .my transformet is 220v input and 140 v out pu