Inductor classification and function

1. Classification of Inductors First, inductance is classified according to six characteristics, namely:

According to the type of inductance: fixed inductance, variable inductance.

According to the nature of the magnetic properties classified by the performance of magnetic properties: air core coils, ferrite coils, core coils, copper core coils.

According to the nature of work: antenna coils, oscillation coils, choke coils, trap coils, deflection coils.

According to the winding structure classification: single coil, multilayer coil, honeycomb coil.

Classified by operating frequency: high frequency coil, low frequency coil.

Classified by structural characteristics: magnetic core coils, variable inductor coils, color coded inductor coils, and non-magnetic core coils.

2. The role of the inductor The basic role of the inductor is filtering, oscillation, delay, notch and so on. In the image of a point of view is: "through the DC, blocking the exchange." In terms of detail, it is in the circuit board, the inductor coil acts on the AC limited current, it can form high-pass or low-pass filter, phase shift circuit and resonant circuit with the resistor or capacitor; the transformer can be AC-coupled, Transformer, converter and impedance conversion. The inductor coil is also an energy storage element. It stores electrical energy in the form of a magnet. The size of the stored electrical energy can be expressed by the following formula: WL = 1/2 Li2. It can be seen that the greater the inductance of the coil, the greater the flow of electricity and the more stored energy. Therefore, the most common function of the inductor in the circuit is to form an LC filter circuit together with the capacitor.