Turns per volt and wire area
Enter frequency, flux density, core area, voltages, regulation, currents, and current density. AWG and EI tables are not used.
Worked example
Turns per volt 4.6922 /V
TPV = 1 / (4.44 * f * Bmax * Ac * 10^-4)
Primary
Primary turns 1079.2042
Np = Vp * TPV
Primary wire area 0.1667 mm2
Area mm2 = current / J
Primary ohms 2665.6589 ohm
Zp / Zs = (Np / Ns)^2
Secondary
Secondary turns 59.1216
Ns = Vs * TPV * (1 + regulation)
Secondary wire area 2.6667 mm2
Area mm2 = current / J
Fill factor 28.1271
Kw = (Np * Ap + Ns * As) / window
Kw is above 0.38.
Estimated Ac 1.6263 cm2
Ac = C * sqrt(VA / f)
This is not approval to build a mains power supply. Insulation, temperature rise, and safety are not checked.
1.15 is the CRGO silicon-steel constant only if you enter it. The 2.5 to 3.5 A/mm2 range is a note, not a stored row.