Explanation some technical terms for magnetic component(10)

Impedance
The impedance of an inductor is the total resistance to the flow of current, including the AC and DC component, the DC component of the impedance is simply the DC resistance of the winding, the AC component of the impedance includes the inductor reactance, the following formula calcalates the inductive reactance of an ideal inductor to a sinusoidal AC signal.
Z=XL=2Pi fL
L is henries and f is hertz, this equation indicated that higher impedance levels are achieved by higher inductance valueds or at higher frequencies, skin effect and core lossed also add to the impedence of an inductor.

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