1. I use mosfet 47n60 ,, 2. in rurg 5060, 3, I only follow the components on the pcb, 4. at least 5kw, I use pfc ..
1) You must include RDS on for 47n60 in the software 0.07 Ohms (from datasheet) and not U sat in this case
2) Diode forward voltage drop for RURG5060 according to datasheet at 30 amps is around 1v
3) if you still want to use 85Khz then correct the copper wire thickness from 0.5 to 0.4mm for the primary as it is too thick for this frequency
Plug the values and see what you get.
When you press calculate then move the mouse on the output voltage result and it will be displayed the peak output voltage. If your smps is not regulated this is what you will get in the output as the result shown will give you the result at load with an output inductor included.
You will get 3 results according to the input voltage (min, Mean and max)
Some hints
Make a bundle of wire with the required number of strands and see how they fit in the transformer try to cover one whole layer. you need to sandwich your secondary between the primary for good coupling. try to avoid partial coverage of the bobbin with each winding as this will bring a lot of leakage inductance and asymmetry. You can lessen some strands if this is the case so that you will have a good fit. You can use 2 or more bundles instead of a single bundle for each winding ( Ex. 2 bundles of 20 wires each will bring 40 strands or 3 bundles of 13 each will bring 39 strands etc)
Use adequate tape (Mylar) to avoid any danger of primary leaking with secondary. 3 layers between pri and sec. 1 layer tape between layers of the same winding. Try to leave some margin space with the windings at the cheeks of the bobbin. 2-3mm on each end.
Good luck Silvio