Maximum Flux Density Calculator

The maximum flux density for a core/coil geometry should be calculated to verify that it is below the specified value for a given core, so that the core doesn't saturate. This calculator is useful in matching a core size to the required power.

Equations:

\( B_{\text{max}} = B_{\text{max}}(\text{AC}) + B_{\text{max}}(\text{DC}) \)

\( B_{\text{max}}(\text{DC}) = \frac{L \cdot I_{\text{dc}} \cdot 10^8}{N \cdot A_c} \)

\( B_{\text{max}} = \frac{V_{\text{rms}} \cdot 10^8}{4.44 \cdot F \cdot N \cdot A_c} + \frac{L \cdot I_{\text{dc}} \cdot 10^8}{N \cdot A_c} \) gauss

Note: if no DC current flows, then the second term of the equation is dropped.

In terms of \( A_L (\mu H/100T^2) \):

\( L = \frac{N^2 \cdot A_L (\mu H/100T^2) \cdot 10^{-4}}{100} \)

\( B_{\text{max}}(\text{DC}) = \frac{N \cdot A_L (\mu H/100T^2) \cdot 10^4 \cdot I_{\text{dc}}}{A_c} \)

AC Terms









Optional DC Terms