Why don't you show what is exactly the issue in a simplest fashion ? If you just want that others check your design to certify if your assumptions are correct, instead of populating the thread with the whole result for each tap of the transformer, it wouldn't be better if you just show up the formulae/reference that you took so that others give you some additional advice to you consider in your design ?These are my new calculations. Have to get the transformer wound for testing
what is the frequency in your country ?
you can use E + I core for 50 HZ .
There is a simplified calculation used in practice : number of turns / volt = 50/A ; where A is the surface of transversal section of the core of the coil in mm^2.
Once you have turns/volt , primary is : turns/volt x primary voltage . Secondary is :turns/volt x secondary voltage
Example :
Given : primary = 220V ac, secondary 12Vac , 25 mmm^2 cross section area of core .
What are the turns for primary and secondary coils ?
turn/volt = 50/25 = 2
primary coil 2 x 220 = 440 turns , secondary coil 2 x 12 = 24 turns .
Usually you need to begin from the power of the transformer . You first calculate the power S you need in [VA] units .
Then the cross section area of the core is A = ~1.4 x sqrt (S) in [ cm^2] units ;
Then you get on with the turns/volt calculations and coil calculations .
You also need to get the cross section of the coil wire to support the current for the power (S) you need
Ok. Let me do the tarnsformer calculations first. I think refrigirator wattage is 150W. Lets take maqx wattage as 300W. I need three stabilizers for personal use. One for refrigirator, one for Washing machine and one for Dish Washer. All 3 are inductive loads.
So, lets assume pf as 0.8.
So, P(VA) = 300 * 0.8 = 240VA.
So, 300VA or 500VA is enough for my purpose.
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