Explanation some technical terms for magnetic component(8)

Saturation Current
The DC bias current flowing through the inductor which causes the inductance to drop by a specified amount from the initial zero DC bias inductance value , common specified inductance drop percentages include 10% and 20%.it is useful to use the 10% inductance drop value for ferrite cores and 20% for powdered iron cores in energy storage applications, the cause of the inductance to drop due to the DC bias current is related to the magnetic flux density, beyond the maximum flux density point, the permeability of the core is reduced, thus, the inductance is caused to drop.

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