Transformer Voltage Calculator











Formula

The formula to calculate the primary voltage of a transformer is:

Primary Voltage:

\[ U_1 = 4.44 \cdot f \cdot B_m \cdot A \cdot N_1 \]

Where:

What is Transformer Primary Voltage?

The primary voltage of a transformer is the voltage applied to the primary winding, which induces a magnetic flux in the core. This flux then induces a voltage in the secondary winding, allowing for voltage transformation. The primary voltage depends on the frequency, magnetic flux density, core cross-sectional area, and the number of turns in the primary winding.

Example Calculation

Let's assume the following values:

Step 1: Calculate the effective cross-sectional area:

\[ A_{\text{effective}} = 0.9 \cdot 400 \times 10^{-6} = 3.6 \times 10^{-4} \, \text{m}^2 \]

Step 2: Calculate the primary voltage:

\[ U_1 = 4.44 \cdot 50 \cdot 1.8 \cdot 3.6 \times 10^{-4} \cdot 1600 \approx 229.94 \, V \]