Inductors are components that can be stored by converting electrical energy into magnetic energy. The structure of the inductor is similar to that of a transformer, but with only one winding. The inductor has a certain inductor, which only prevents the current from changing. If the inductor passes without current, it will attempt to prevent the current from flowing through it when the circuit is switched on, and if the inductor is in a state where current is passing through, it will attempt to maintain the current when the circuit is disconnected. Inductors are also known as chokers, resistors, dynamic resistors.
Inductors have the opposite characteristics of capacitors, and they have the characteristics of preventing AC from passing through and allowing DC to pass smoothly. The resistance of the DC signal through the coil is that the resistance voltage drop of the wire itself is very small, when the AC signal passes through the coil, the two ends of the coil will produce a self-sensing electromotive force, the direction of the self-sensing electromotive force and the direction of the additional voltage opposite, hindering the passing of the AC, so the characteristics of the inductor is THROUGH, impedance AC, the higher the frequency, the greater the coil impedance. Inductors often work with capacitors in circuits to form LC filters, LC oscillators, etc. In addition, people also use the characteristics of inductors, the manufacture of flow-blocking rings, transformers, relays and so on.
DC: refers to the inductor on the DC path off state, if not counting the resistance of the inductive coil, then the DC can "unobstructed" through the inductor, for DC, the coil itself resistance is very small on the DC obstruction effect is very small, so in the circuit analysis is often ignored.
AC resistance: When AC passes through the inductive coil, the inductor has an obstructive effect on acelectrance, which is the inductive coil's inductive resistance.
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