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#### Maximum Flux Density Calculator

See our other Electronics Calculators.

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.

Note that if there is no DC term, then the calculation is completely independent of the core material.

 AC Terms Vrms (Vrms) F (frequency, use the minimum frequency that the coil will see) (MHz) N (Number of turns) Ac (Equivalent area -  the cross section of core) (cm2) Optional DC Terms. Idc (DC current through winding. This is optional) (A) L (Specific to core used. Only enter if, coil has DC) (uH) Bmax (gauss)

#### Equations

Bmax=Bmax(AC)+Bmax(DC)

Bmax(DC)=  (L*Idc*108)/(NAc)

Bmax= (Vrms*108)/(4.44*F*N*Ac) + (L*Idc*108)/(N*Ac) gauss

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

#### In terms of AL(uH/100T2):

L= N2AL(uH/100T2)10-4

Bmax(DC)=  (N*AL(uH/100T2)104*Idc)/(Ac)

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