Iron Powder Core Vs Ferrite
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These types of inductor use ferrite core.
Iron powder core vs ferrite. Making a decision between the two and how much. The conversion from uh 100 turns. Using a vectorial network analyzer i measured the cmrr on both chokes obtaining the following results. That 160m 180m transformer requires about 50 turns from my experience with high power rf transformers i know that iron powder toroids are less.
Fewer turns will be required by the ferrite type core for a given inductance. The metals have different aspects to them and as such each react slightly differently. There s a distributed nonmagnetic gap in the these cores which increases their saturation flux density in comparison to an ungapped core or the same material. Let s focus on simple toroids of different sizes as a start because this is what most iron powder cores look like.
There is a simple thing to remember that can help you make a decision. In order to evaluate the choking characteristics of the red toroids i prepared two chokes by winding 12 coils of rg 58 on a iron powder t200 2 toroid and a ferrite ft240 43 one. Manufacturer s data for iron powder and ferrite cores are in the data tables and show all the required information. The al figure for iron powder cores is given as uh 100 turns but for ferrite cores it is quoted as mh 1000 turns.
Ferrite is a material with high magnetic permeability made from the mixture of iron oxide ferric oxide fe 2 o 3 a small percentage of other metals such as nickel zinc barium etc. When the same voltage drop is applied across a decreased number of turns the flux density will increase accordingly. Some other time an iron powder core may be just right and a ferrite core may be a bad idea. Iron powder cores low permeability are superior to the ferrite material cores for high power inductors for this reason.
When or if you are working with. Still i want to avoid really bad mistakes like using iron powder when i m building an antenna balun. Note that many other manufacturers quote al as nh t2 for both types of material. The main thing to consider is ferrite and powdered iron cores.
Of each is use is no simple take.
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