I have an inductor ring from Micrometals. T60-26
In this page what is Relative magnetic permeability? link
For my example is it 50.0?
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No - that is not the relative permeability.
They already calculated the effect of the permeability and the magnetic path of the core into a more useful number: \$A_L\$. This is the inductance in nano-henries that a given number of wire turns on the core will give. The inductance goes up as the square of the number of turns because of mutual inductance between the turns.
For example if you put 10 turns on the core, this will give 10² * 50 = 5000nH.
answered Jun 12, 2017 at 19:10
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\$\begingroup\$ If I want 470uH (microHenry) with T60-26 how can I calcutate the number of turns? \$\endgroup\$– LobiCommented Jun 12, 2017 at 19:16
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1\$\begingroup\$ $$N = \sqrt{\frac{L}{AL}} = \sqrt{\frac{470 \mu H}{50nH/N^2}} = 97 turns$$ \$\endgroup\$– G36Commented Jun 12, 2017 at 19:31
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1\$\begingroup\$ AL is in nano Henry so \$ 470µH = 470000nH\$---> \$470000nH/50nH = 470000/50 = 9400\$ and finally \$ \sqrt{9400} = 96.953 = 97\$ \$\endgroup\$– G36Commented Jun 12, 2017 at 20:05
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2\$\begingroup\$ Don't bother, I don't help for points. \$\endgroup\$– G36Commented Jun 12, 2017 at 20:17
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1\$\begingroup\$ @G36 having an accepted answer that's correct isn't for you (the answerer), it's for anyone else that comes across the question. \$\endgroup\$ Commented Jun 12, 2017 at 20:22