Material characteristics of wire power inductors and the difference between chip inductors and wire wound inductors | GETWELL

First of all, what is a wire wound inductor?

There are many types of inductors, such as: power inductors, laminated inductors, wire wound inductors, etc. Today, Gewei smd power chip inductors will tell you about wire wound inductors.

Wire wound inductor is one of the chip inductors. It is an electromagnetic induction component wound with insulated wires, and it is also one of the commonly used components in circuits. Widely used in micro TV, LCD TV, video camera, portable VRC, car audio, thin radio, TV tuner, mobile phone, etc.

Wirewound inductors have many advantages:

1. Appearance and size conform to EIA (Electronic Industry Association) standards, and there are many types of packages, which can be applied to circuit boards with different requirements.

2. Surface mount feature, so it has good solderability, and can provide tape packaging for automatic assembly.

3. Heat resistance.

4. Low magnetic flux leakage, low DC resistance, and high current resistance.

5. High precision and low loss (that is, large Q value).

6. The production process is simple and the cost is low.

The basic function of winding inductance:

Filtering, oscillation, delay, notch, etc., simply put: "pass DC, block AC".

The composition of the winding inductance:

The winding inductance consists of a skeleton, a winding, a magnetic core, a magnetic rod, and an iron core.

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The magnetic core material of the wire wound power inductor is not fixed. The magnetic core has a magnetic flux. Different magnetic core materials, the magnetic flux is naturally different, which ultimately affects the inductance of the wire wound inductor. The higher the magnetic permeability of the magnetic core, the greater the inductance of the wire wound inductor! Different core materials also produce different wire wound inductances. For example, the inductance of our China Gewei Electronics has wire wound chip ferrite. Inductors, wire wound chip ceramic inductors, etc. There are two core materials in the wire wound inductor, and these two materials also affect the basic performance of the wire wound inductor, that is, the magnetic core and the wire. Xiaobian Jin Haode does not talk about the wire, mainly for everyone to analyze the influence of the magnetic core on the wound inductor.

SMD power chip inductor

The difference between SMD laminated inductors and wire wound inductors is mainly reflected in 5 aspects: Differences in production process: Wire wound chip inductors are based on the traditional wire wound inductor production process, which converts traditional plug-in inductors into SMD packaging, and at the same time The volume of the inductor is reduced, and the installation and use are more convenient; the chip laminated inductor is made by using the multi-layer printing technology and the laminated production process.

Other differences: The heat dissipation of the SMD laminated inductor is better than that of the wire wound SMD inductor. the difference. To sum up, SMD laminated inductors cannot see the wire, and the anti-inductance interference ability, heat dissipation, and installation space saving are better than SMD wire-wound inductors, but the wire-wound inductors are better in terms of current resistance and inductance production cost. It is slightly better, and the ESR value of the wire wound inductance is higher than that of the chip laminated inductance.

Earlier we mentioned that the different magnetic core materials directly lead to the different inductance of the winding inductance. In fact, in addition to this, the magnetic core also makes the use of the winding inductance different! Different magnetic cores have different performances, and other other aspects. For example, wound chip ferrite inductors are suitable for use as power inductors, choke coils, and energy storage inductors. The winding inductance of the iron powder core material has strong M characteristics, and is more suitable for use as a filter to reduce electromagnetic interference. There are also wound chip ceramic inductors that are mostly used to isolate AC signals, filter or form resonant circuits with capacitors and resistors!

pecializing in the production of various types of color ring inductors, beaded inductors, vertical inductors, tripod inductors, patch inductors, bar inductors, common mode coils, high-frequency transformers and other magnetic components.

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Post time: Sep-07-2022