Inductors introduction

Inductors introduction

Inductor is an element that can convert electrical energy into magnetic energy and store it. The structure of the inductor is similar to that of a transformer, but it has only one winding. The inductor has a certain inductance, it only hinders the change of current. If the inductor is in a state where no current is flowing, it will try to block the current from flowing through it when the circuit is on; if the inductor is in a state where current is flowing, it will try to maintain the current when the circuit is off. Inductors are also called chokes, reactors, and dynamic reactors.

The role of inductance: filtering, oscillation, delay, notch; the image saying: "pass DC, block AC

Direct current: The so-called direct current means that in a DC circuit, the inductance acts as a wire and does not have any effect.

Resistance to AC: In an AC circuit, the inductor will have impedance, that is, XL, and the current in the entire circuit will become smaller, which will hinder the AC to a certain extent.

The blocking effect of inductance: The self-induced electromotive force in the inductor coil always changes with the current in the coil.

Inductprs tuning and frequency selection: Inductance coil and capacitor in parallel can form an LC tuning circuit.

Inductors also has the functions of filtering signals, filtering noise, stabilizing current and suppressing electromagnetic interference.