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I am having ferrite core T60006-L2063-W517 Ferrite Toroids /Ferrite Rings Core 63x50x25 58.6uH@10kHz. I wanted to measure inductance of the core from datasheet it shows,
Ferrite Rings Core 63x50x25 58.6uH@10kHz what does this mean by the way..? Inductance test without DC-magnetisation :
Setting values: Ieff x N = 40 mA f = 10 kHz
Specified value: 44 µH ≤ AL ≤ 85 µH
but doesn't ring a bell can anyone suggest me on this please...?
Ferrite Rings Core 63x50x25 58.6uH@10kHz what does this mean by the way..?
Well, that information is directly from the mouser website and, it is at odds with the data sheet. The Mouser website is appearing to say this: -
So, it's unclear where Mouser pulled this information from. However, further down the Mouser page they do state things that match the data sheet. So, my advice is ignore that earlier statement and stick with what the data sheet tells you.
Specified value: 44 µH ≤ AL ≤ 85 µH
That information is telling you what the range of values the inductance may be for one turn of wire. In other words it's their guarantee that if you bought a hundred units and tested each unit you might get a range of inductance that approached those limits.
Setting values: Ieff x N = 40 mA f = 10 kHz
Here, they are telling you how the test can be done. They talk about Ieff and N and the product of those must be equal to or less than 40 mA. In normal-speak, they are saying that there is a limit on the ampere-turns used when measuring inductance. They say this because it's quite tricky to measure inductance with just one turn and you may choose to wind (say) ten turns. If you wind ten turns then make sure your test current is less than 4 mA and, in all probability that is the peak current of the 10 kHz sinewave you apply. The ampere-turn limit is to avoid transformer core saturation giving an inductance value that is falsely low.
Bear also in mind that 10 turns will produce a nominal inductance value of 100 x 59 μH because inductance is proportional to turns squared.
The inductance depends on the material and the geometry of the magnetic core as well as the number of turns of the coil. The \$A_L\$ value is basically an inductance for a one-turn coil used with the given magnetic core. This simplifies the calculation of the inductance of a coil to: $$L = A_L N^2$$
with \$N\$ being the number of turns. There is usually a rather large tolerance on \$A_L\$, but it is an easy starting point when selecting magnetic cores.
