Full Bridge Converter

Hello,

I want to design a 4kW dc-dc Full Bridge converter, with 24V input and 350V output. I'm going to use ETD59 if it handle 4kW, or a 3C90 and I'm going to work on frequencies from 75 to 100 kHz.

After doing different calculations I have come to the conclusion that in the first winding I should have 1 turn of litz, my doubt is how should I do it in a real way? How should I distribute the wire through the core? I thought interleaving maybe the primary and secondary windings, but I don’t know which solution could be the best.

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