Iron Powder Core

Iron powder core is a popular term for magnetic material Fe3O4. It is mainly used in electrical circuits to solve the problem of electromagnetic compatibility (EMC). In practical application, various other substances will be added according to different filtering requirements in different 。

Feature editing broadcast

The clutter above the wire mainly solves its electromagnetic compatibility problem through the 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 some heat, which is consumed. To reduce clutter.

The material of magnetic ring is mostly iron powder core (low price, widely used), and advanced rare earth materials.

Noise

Due to the large mechanical damping of the magnetic composite material in its structure, the noise of the iron core is small. When comparing the noise characteristics of the reactor with annular ferrite iron core and the magnetic composite reactor with the same size, shape and inductance, the noise of the reactor with magnetic composite material is reduced by about 10dB for the sine wave voltage of 500Hz ~ 20kHz.

For a long time, the magnetic material used in power electronic devices has always been electrical steel material. In the commercial frequency range, this material has excellent magnetic properties, but its characteristics deteriorate sharply with the increase of frequency. On the contrary, ferrite material has excellent high-frequency characteristics, but it can not be used as high-power devices due to its low saturated magnetic flux density. Pressed powder magnetic core material has excellent high-frequency characteristics and high magnetic flux density, which can be widely used in the fields where electrical steel and ferrite cannot be used. This kind of material is formed by mold, which can be made into various complex shapes and has the characteristics of machinability. As a new material widely used in the field of power electronics and anti EMI, it should be paid attention to.