Note: Use Standard Stamping Tables in Excel to match this calculated area to available lamination sizes like EI-33 or EI-40. 3. Winding Calculations
) Formula This is the most critical calculation in transformer design: transformer design calculation excel
To make the tool user-friendly, organize your rows as follows: Excel Formula (Example) Power (VA) =B2*B3 (Secondary V * I) Core Core Area ( Accap A sub c =1.15*SQRT(B4) Windings Turns Per Volt =1/(4.44*10^-4*B5*B6*B7) Primary Primary Turns =B1*B8 Secondary Secondary Turns =(B2*B8)*1.05 (with 5% compensation) Check Window Space Factor =(Total Wire Area) / (Core Window Area) 6. Key Design Checks Note: Use Standard Stamping Tables in Excel to
): For standard silicon steel (stampings), this is usually between A safe assumption for small power transformers is 2. Core Sizing and Area Calculation Key Design Checks ): For standard silicon steel
Ac=1.15×VAcap A sub c equals 1.15 cross the square root of cap V cap A end-root
TPV=14.44×10-4×Ac×f×Bcap T cap P cap V equals the fraction with numerator 1 and denominator 4.44 cross 10 to the negative 4 power cross cap A sub c cross f cross cap B end-fraction Secondary Turns ( Nscap N sub s ):
Iδthe fraction with numerator cap I and denominator delta end-fraction