INDUCTANCE

Inductance Classification
Inductors can be classified according to different standards, mainly including the following categories:

types of inductors:

fixed inductance: The inductance value is fixed to a certain value during the design and manufacturing process. It is mainly used to store and release electrical energy.
Variable inductance: The inductance value can be adjusted. It is usually used in circuits that need to adjust the inductance. The inductance value is adjusted by changing the saturation of the magnetic core.
Classification by permeability characteristics:

Air core coil, ferrite coil, iron core coil and copper core coil are classified according to different magnetic core materials used in coils.
By job type:

antenna coil, oscillation coil, choke coil, trap coil, deflection coil, according to the specific role of the coil in the circuit classification.
Classification by winding structure:

Single-layer coils, multi-layer coils, and honeycomb coils are classified according to the winding method and structure of the coils.
Classification by operating frequency:

High-frequency coils, low-frequency coils, etc., are classified according to the working frequency range of the coils.
Classification by structure:

magnetic core coils, variable inductance coils, color code inductance coils, coreless coils, etc. are classified according to the structural characteristics of the coils and whether they contain magnetic cores.
These classifications help to better understand and apply different types of inductors to meet different circuit requirements