What is the purpose of magnetic wire surround inductors?

December 06, 2022

Wirewound Inductors are used in power supply circuits, and the products are widely used in miniature TVs, LCD TVs, cameras, etc.

Wirewound Inductor Features

1. Suitable for power supply circuits.

2. Surface bonding type.

3. Appearance and size conform to EIA standard, different size specifications are available.

4. Good solderability and heat resistance, suitable for general soldering and re-soldering.

Applications: This product is widely used in micro TV, LCD TV, camera, portable VRC, car stereo, thin radio, TV tuner, mobile phone, etc.

Wirewound Inductor Role

The role of SMD wirewound inductors. Basic functions: filtering, oscillation, delay, trapping, etc;

Image: "Pass DC, block AC".

Refinement: In electronic circuits, inductor Coils have a limited current effect on AC, and they can be used with resistors or capacitors to form high-pass or low-pass filters, phase shifting circuits, and resonant circuits; transformers can be used for AC coupling, voltage transformation, current transformation, and impedance transformation.

The role of SMD wirewound inductors seems to be somewhat antagonistic, as we have said that capacitors are through-crossing and blocking straight, while inductors are exactly the opposite, their role is through-crossing and blocking.

And AC is positive and negative change, so the magnetic field will also change, because from positive (negative) to negative (positive) is a very short period of time, assuming that the first positive potential and rising, then the magnetic field around the inductor is increasing, to the top is the maximum, when the potential began to fall, due to the existence of magnetic fields around the inductor at this time will convert the surrounding magnetic field into electrical energy, so that electrical energy can be maintained for a period of time, and vice versa This will prevent the passage of alternating current.

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Ms. Song

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