Equivalent Circuit Model of a Magnetic Ring and Impedance frequency curve of the magnetic ring

Here, R is the equivalent resistance representing the wire loss, L is the actual inductance of the magnetic ring, and C is the equivalent capacitance between the windings of the magnetic ring. The circuit after the winding of the magnetic ring is equivalent to an inductor.

Impedance frequency curve of the magnetic ring

When the magnetic ring is unsaturated, its corresponding impedance increases with the frequency. When the frequency exceeds the resonance point, the impedance tends to decrease.