Electrical Can a Transformer Be Converted into a Welder Transformer?

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SUMMARY

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.

PREREQUISITES
  • Understanding of transformer coil configurations
  • Knowledge of basic electronics and safety precautions
  • Familiarity with welding principles and requirements
  • Experience with rectifiers and capacitors in power circuits
NEXT STEPS
  • Research transformer coil configurations for welding applications
  • Learn about modifying transformer windings to adjust voltage and current
  • Study the use of rheostats in DC circuits for voltage regulation
  • Explore safety measures when working with high-voltage electrical systems
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Electronics enthusiasts, DIY welders, and anyone interested in modifying transformers for welding applications will benefit from this discussion.

Redio
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Hello can anyone how to convert this transformer in a welder transformer
20190409_193551.jpg
 
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Redio said:
Hello can anyone how to convert this transformer in a welder transformer
Convert it to what?
 
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In a welder transformer
 
Hello Mr radio
That's ok, well explanation about what do to use it?
 
I need this transformer to make a welder the input voltage is 220v and the output is 108v and58 v but in 58 volt is has no amperage
 
May I ask what experience you have with electronics because creating a welder with a transformer can be quite dangerous. I haven’t done it but I have learned about the danger when I wanted to make one.
 
I finished the welder but i have somme issues on the input voltage is to height is 143 volt
 
  • #10
I have both practical and theoretical experience on welder stuff.. So I need to ask you some question about your present transformer
 
  • #11
Adiel Samson said:
I have both practical and theoretical experience on welder stuff.. So I need to ask you some question about your present transformer
Thnx .my transformet is 220v input and 140 v out pu
 
  • #12
Redio said:
Thnx .my transformet is 220v input and 140 v out pu
I have also putet a bridger rectifier
1PCS-FUJI-6RI75E-080-6RI75E080-Module-New-100-Best.jpg

And 2 condesatorss 4700uf 450 volt
 
  • #13
Redio 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) thanks
 
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  • #14
Thnx for the advice
 
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  • #15
This is look like
 

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  • #16
I hawe 145dc in output is possible to put a rheostat to lower the dc to +/- 50 volt
 

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  • #17
Or more
 
  • #18
Please make your connection like this
 

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  • #19
Ok thnx
 
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  • #20
Much beter now 75 volt an 80volt on the other core thnx
 
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  • #21
Thanks for understanding my guide
 
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  • #22
The OP question has been well answered. Thread closed.
 

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