Iron Powder Core Permeability

Used for emi filters and dc chokes.

Iron powder core permeability. Iron powder cores series products sendust core mpp core high flux core 1. For passive magnetic levitation a relative permeability below 1 is needed corresponding to a negative susceptibility. Permeability varies with a magnetic field. The chart above shows the permeability of three sintered powder metal soft magnetic materials.

The charts that are created by manufactures should show the best type of powered iron to use for specific frequency ranges. Silicon iron powder compound. Stable and reliable properties effective permeability has excellent frequency property. Values shown above are approximate and valid only at the magnetic fields shown.

Pure iron iron 0 45 phosphorus and iron 3 silicon. You can also sometimes find powdered iron in some audio products like an audio inductor in telephones. 1 the carbon iron and 2 the hydrogen reduced iron. Magnetics powder core products kool mu sendust mpp molypermalloy kool mµ max kool mu hƒ edge tm high flux xflux and 75 series materials are distributed air gap cores that are primarily used in power inductor applications specifically in switched mode power supply smps output filters also known as dc inductors.

Character of iron powder cores. This material has low core loss similar to the 8 material with higher permeability and a lower cost. The carbonyl iron cores are especially noted for their stability over a wide range of temperatures and flux levels. Iron powder cores general material properties material reference permeability µo temp.

There are two basic groups of iron powder material. G18 55 385 6 6 green red a good dc saturation characteristics. A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical electromechanical and magnetic devices such as electromagnets transformers electric motors generators inductors magnetic recording heads and magnetic assemblies it is made of ferromagnetic metal such as iron or ferrimagnetic compounds such as ferrites. A good magnetic core material must have high permeability.

Has highest permeability of all of the iron powder materials. The difference depends on the core size permeability core finish thickness wire size and number of turns in addition to the way windings are put on the core. Ppm oc material density g cm3 color note y8 35 255 6 5 yellow red a good high frequency material it has low core loss and good linearity under high bias conditions. Examples of the use of powdered iron can be found in rf filters rf amplifiers and if amplifiers.

Both the iron phosphorus and the iron silicon were produced by adding either an iron phosphorous or iron silicon master alloy. High saturated magnetic induction strength it may work in large current without saturation. The difference is negligible for 125µ and higher and turns greater than 500.