The basic role of the inductor

The basic role of the inductor: filtering, oscillation, delay, notch, etc.
Image said: "through DC, blocking communication"

Detailed explanation: In the electronic circuit, the inductor coil acts on the AC finite current, and it can be combined with a resistor or capacitor.

It is a high-pass or low-pass filter, a phase shifting circuit, a resonant circuit, etc.; the transformer can perform AC coupling, voltage transformation, current conversion, and impedance transformation.

Known by the inductive reactance, the larger the inductance, the higher the frequency, and the greater the inductive reactance.

The voltage across the inductor is proportional to the inductance and proportional to the rate of change of current. This relationship can also be expressed by the following equation: The inductor is also an energy storage component.

It stores electrical energy in the form of magnetic. The stored electrical energy can be seen by the following formula. The larger the inductance of the coil is, the more the stored electric energy is.

The most common function of the inductor in the circuit is to form a filter circuit together with the capacitor.

Capacitors have the ability to "block DC, pass AC", while the inductor has the function of "DC, DC".

If the DC current with many interfering signals is passed through the filter circuit, the AC interference signal will be consumed by the capacitor into thermal energy, and a relatively pure DC current will pass through the inductor.

Among them, the AC interference signal is also changed into magnetic induction and thermal energy, and the higher frequency is most easily affected by the inductance, which can suppress the interference signal of higher frequency.

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