Tuesday, February 16, 2016

What is the effect of DC on coil inductance?

If Xl = R  the inductance can be calculated. Doing this without DC will give the inductance of the coil to AC. Set the DC current you expect your circuit to pass throw the coil and check again. If Xl is decreased drastically with DC your inductor may need an air gap to 'lose' some lines of force and prevent saturation.Inductive coupling is through the coupling of magnetic lines. The core's purpose in to contain or concentrate the lines. As the field builds it will reach a point that no more lines can be contained. At that point magnetic coupling ceases.

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