square coils

[diminute]

how you calculate the square coil´s inductance ???


diminute

[Geosearch]

Any responses?? I'm curious!

[1843]

how you calculate the square coil´s inductance ???


diminute

Simply change it to a circular coil:
4a=pD where "a" is the square side and "p" is 3.14 and D is the circle diameter.

[goldjackal]

Or check out: http://www.emclab.umr.edu/new-induct/

They have both a calculator for coils of various shape, and the calculations used to produce the results. You'll have to do a web search, though, for the relative permeability of copper (or whatever alloy/metal wire you're using)

[Qiaozhi]

Or check out: http://www.emclab.umr.edu/new-induct/

They have both a calculator for coils of various shape, and the calculations used to produce the results. You'll have to do a web search, though, for the relative permeability of copper (or whatever alloy/metal wire you're using)

Actually, the relative permeability referred to in the formula is for the medium, which is air. Not the wire material. In this case, the permeability of air is 1.256 x 10E-6 H/m. However, this is not the value to use in the calculator, because permeability(relative) = permeability(material) / permeability(air), and therefore (air / air) = 1.

Unfortunately this calculator will not be very accurate for designing a metal detector coil, as this formula is more suited to a solenoid.