Transformer Design Calculation Excel [new] -

Where you enter your specific design requirements (Voltage, Frequency, Power).

Output summaries showing losses, efficiency, and regulation. 2. Step-by-Step Design Formulas for Excel

Ns=Vs×1.05Vtcap N sub s equals the fraction with numerator cap V sub s cross 1.05 and denominator cap V sub t end-fraction transformer design calculation excel

Reserve your first rows for user inputs. Let’s assume the following cell assignments for your inputs: Cell B3 (in Volt-Amperes, VA) Primary Voltage ( V1cap V sub 1 ): Cell B4 (in Volts) Secondary Voltage ( V2cap V sub 2 ): Cell B5 (in Volts) Frequency ( ): Cell B6 (in Hz, typically 50 or 60 Hz) Estimated Efficiency ( ): Cell B7 (expressed as a decimal, e.g., 0.95 for 95%) Calculate the Input Power ( Pincap P sub i n end-sub ) in cell B8 : =B3/B7 Step 2: Determine Core Cross-Sectional Area ( Accap A sub c

| Row | Parameter | Excel Formula (Paste into Column C) | Unit | | :--- | :--- | :--- | :--- | | | CALCULATIONS | | | | 12 | Power Rating | =C3*C4 | VA | | 13 | Primary Current (Approx) | =C12/(C2*C8) | Amps | | 14 | Core Area (Cross Section) | =SQRT(C12)*1.15 | cm² | | 15 | Tongue Width (Approx) | =SQRT(C14*100) | mm | | 16 | Stacking Height | =(C14*100)/C15 | mm | | 17 | Turns Per Volt (TPV) | =1/(4.44*C6*C5*C14*C9*0.0001) | Turns/Volt | | 18 | Primary Turns | =C2*C17 | Turns | | 19 | Secondary Turns (+5% Reg) | =C3*C17*1.05 | Turns | | 20 | Primary Wire Area | =C13/C7 | mm² | | 21 | Secondary Wire Area | =C4/C7 | mm² | | 22 | Primary Wire Diameter | =SQRT(4*C20/PI()) | mm | | 23 | Secondary Wire Diameter | =SQRT(4*C21/PI()) | mm | Where you enter your specific design requirements (Voltage,

Go to Data > What-If Analysis > Goal Seek . Set cell "Regulation %" to value "3" by changing cell "Current Density". This automatically optimizes wire size.

=ROUND(Primary_Voltage / Voltage_Per_Turn, 0) Number of Secondary Turns ( N2cap N sub 2 Step-by-Step Design Formulas for Excel Ns=Vs×1

The core loss is typically expressed in watts per kilogram. For three-phase core-type transformers, sophisticated design programs using Microsoft Excel can analyze the relationships between design variables and no-load losses, copper losses, and overall efficiency.

N secondary = N primary × (V secondary / V primary )

One of the greatest strengths of using Excel for transformer design is the wide array of specialized tools already developed by engineers and manufacturers. These spreadsheets act as powerful calculators, automating complex routines.