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Value of current density of transformer windings

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rahul91

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Hi,
I want to design a high frequency(100KHz) transformer of 125A secondary current. What can be the maximum current density to be assumed(secondary and primary) , if the application is a welding power supply...?
 

8-12 A/mm2 for intermittent duty of welding.
 
For this frequency you have to use multiple isolated stranded wires. to lower the effect of skin effect.
 

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