Example: For f=50Hz, Bmax=1.2T, Ac=12 cm² → Tpv ≈ 3.12 turns/volt.
Awire = I / J (in mm²)
Primary current: Ip = VA / Vp (add 10% for magnetizing current in small designs) Wire area: A_wire = I / J (J in A/mm²) Diameter: d = 2 * sqrt(A_wire / π) transformer design calculation excel
is a constant (typically 1.1 to 1.2 for standard silicon steel). Net core area in cm2c m squared 3. Turns Per Volt (TPV) This is the most critical constant in your sheet. Formula: Bm: Flux density (usually 1.0 to 1.2 Tesla for CRGO steel). 4. Winding Calculations Calculate the actual number of turns for both coils: Primary Turns ( ): Secondary Turns ( ): Example: For f=50Hz, Bmax=1
Distinguish input cells (usually with a colored fill) from calculated cells. Turns Per Volt (TPV) This is the most