How to make a transfomer

How to make a transfomer (transformer):
First: Determine the transformer VA:
For example: We will create a voltage transformer with 2 x 32 volt, 5 Ampere. Secondary Power: 2 x 32 x 5 = 320 VA. Primary Power: 1.25 x 320VA = 400VA.

Second: Calculated nuclear weight:
Nuclear Weight (grams) = 1.5 x the primary x 1.5 x 7.8 = 400 x 7.8 = 4680gr = 4.68 kg.

Third: Calculate the iron core.
b = root 3 of ((1.5 x primary power) divided by 9.9) = 3.92 cm (4cm rounded).
h = b / 0.6561 = 6cm.
Cross-sectional area (A) = b x h = 4 x 6 = 24 cm2.

Fourth: Determine the number of coils per volt: 50 / A (cross-sectional area) = 50/24 = 2.08 = 2lilit / volt. * Fifth: Determining Copper Diameter: 0.7 x root 2 of the current.
"Diameter of secondary roots = 0.7 x 5 = 1.56 mm. Diameter of primary root = 0.7 x 1.82 = 0.94 mm. "1.82 = 440va/220volt.

if transformer toroid models have no engines roll so hard. with a manual like embroidery or crochet. toroid cool too hard to find in accordance with the size you want.

if the model more easily roll their own box, tool roll which many distinguished sales manual.
like this.

I just roll transformer calculation is simple:
* volt x 2 + 10%
example:
* 220v x 2 + 10% = 440 + 10% = 484 rolls.

I used to Koker pcb with copper I remove the first layer.
designs like the letter I and the letter O box, adjustable size with cool that will be used.