Iron Powder Core
Oct 21, 2019
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Iron powder core is a popular term for magnetic material Fe3O4, which is mainly used to solve the electromagnetic compatibility (EMC) problem in electrical circuit. In practical application, different kinds of other substances will be added according to different requirements for filtering in different bands.
This material is composed of carbon-based ferromagnetic powder and resin-based ferromagnetic powder. Because of its low price, the core of iron powder is still the largest amount of magnetic powder, and its permeability is between 10 and 100.
Electromagnetic compatibility (EMC) refers to the clutter generated by various reasons in the electrical circuit. These clutters not only harm the normal operation of the electrical circuit, but also harm the human body to a certain extent. Therefore, countries (especially the EU) have various regulations on this, namely electromagnetic compatibility (EMC).
The clutter on the wire mainly solves its EMC problem by magnetic ring. When a certain band of clutter passes through the magnetic ring, the electromagnetic characteristics of the magnetic ring cause the current in this band to be converted into magnetic force and part of the heat, which is consumed. To achieve the purpose of reducing clutter.
The materials of magnetic rings are mostly iron powder cores (cheap, widely used), and advanced rare earth materials.
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