Value of current density of transformer windings

[rahul91]

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...?

 

[Velkarn]

8-12 A/mm2 for intermittent duty of welding.

 

[rahul91]

8-12 A/mm2 for intermittent duty of welding.

Thanks Velkarn

 

[m.mokhtar]

For this frequency you have to use multiple isolated stranded wires. to lower the effect of skin effect.