What is the difference between the choke coil and the inductance?The following Chinese inductance factory will introduce to you:
One. Different nature
1、Inductance: a component capable of converting electrical energy into magnetic energy and storing it.
2. Choke coil: a common mode interference suppression device with ferrite as the magnetic core.
Two, the structure is different
1. Inductance is generally composed of skeleton, winding, shielding cover, packaging material, magnetic core or iron core, etc.
(1) skeleton, which generally refers to the support of the coil.Some of the larger fixed or adjustable inductors (such as oscillating coil, choke coil, etc.) most of the enameled wire (or gauze wire) wrapped around the skeleton, and then the magnetic core, copper core and iron core into the skeleton cavity, in order to improve its inductance.The skeleton is usually made of plastic, bakelite and ceramic.
It can be made into different shapes according to actual needs.Small inductors (such as color inductors) generally do not use a skeleton, but directly coated wire wrapped on the core.A hollow inductor (also known as a dismounted coil or a hollow coil, often used in high-frequency circuits) does not require a magnetic core, skeleton, or shield, but wraps the mold before removing it and pulls the coil a certain distance from the coil.
(2) winding, winding refers to a set of coils with a specific function, is the basic component of the inductor.The windings can be divided into single layer and multilayer.There are two types of single-layer winding: close winding (winding one by one) and mutual winding (winding with a certain distance between each circle).Multilayer winding includes layering flat winding, random winding, honeycomb winding, etc.
(3) magnetic core and magnetic bar, the core and magnetic bar is generally made of nickel and zinc ferrite (NX series) or manganese and zinc ferrite (MX series) and other materials, it has "work" shape, column shape, cap shape, "E" shape, pot shape and other shapes.
(4) iron core, iron core materials are mainly silicon steel sheet, permo alloy, etc., its shape is mostly "E" type.
(5) shielding cover: in order to avoid the influence of magnetic field generated by some inductors on the normal work of other circuits and components, a metal shielding cover (such as the oscillating coil of a semiconductor radio) is added to the shielding cover.The use of shielded inductance will increase the coil loss and decrease the Q value.
(6) packaging material, after winding some inductors (such as color standard inductors, color ring inductors, etc.), the coil and magnetic core are sealed with packaging material.The packaging material is plastic or epoxy resin.
2. The choke coil is symmetrically wound on the same ferrite ring magnetic core by two coils of the same size and the same number of turns, forming a four-terminal device.
Extended information:
The most common function of inductance in circuit is to form LC filter circuit together with capacitance.Capacitance has the characteristic of "resistance to dc and ac", inductance has the characteristic of "resistance to dc and on ac".
If the dc current of many jamming signals passes through the LC filter circuit, the ac jamming signal will be consumed into heat energy by the inductance.As the dc current through the inductance becomes more pure, the ac jamming signal will also be converted to the magnetic inductance.The inductive impedance is the easiest to suppress thermal energy and higher frequencies, and the inductive impedance can be suppressed.High frequency interference signal.
Post time: Apr-04-2020