A flat spiral coil is a type of an air core inductor usually incorporated in the primary of a tesla generator rfid tag and proximity detectors.
Calculating inductance of flat sheet of copper.
However even a straight piece of wire or your electrode has some self inductance this can be important if you are dealing with low impedances 1 ohm at high frequencies 10khz.
Length of the conductor mm w.
Strap inductance 0 2 l in 2 l w t 0 223 w t l 0 5 dimension where l length w width t thickness if dimension unit is mm then dimension 1.
The dc resistance of a conductor is calculated using the equation where.
Lcoil n 2μ0μr d 2 ln 8d d 2 l c o i l n 2 μ 0 μ r d 2 l n 8 d d 2 where.
μr μ r relative permeability.
L is the length in metres.
Using the coil inductance calculator.
Enter the coil length measured as depicted in the diagram above.
Lcoil l c o i l inductance of the coil in henries h n 2 n 2 number of turns.
We generally associate inductance with a loop or coil of wire.
μ0 μ 0 permeability of free space 4π 10 7.
Where l is the length in cm w is the width in cm t is the thickness in cm pcb copper 1 oz ft2 0 035mm.
Width of the conductor mm t.
D d wire diameter.
1 inch 0 0254m 2 54cm 25 4mm.
ρ is the resistivity of the conductor in ω m.
Inductance of the conductor μh ell.
This formula applies at low frequencies 30mhz using enameled copper wire.
For more information see about our calculators.
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Enter the coil diameter measured as depicted in the diagram above.
You can choose from single layer solenoid multi layer solenoid and flat spiral coil forms.
Copper is not a perfect conductor.
Thickness of the conductor mm.
L inductance u r relative permeability of the core material air 1 turns number of turns on the coil area the cross sectional area of the core in square meters including some of the coil as shown in the diagram length length of the coil in meters.
D d loop diameter.
If we wind a wire into a coil it obviously creates inductance but even a straight piece of wire or a component lead has some parasitic inductance caused by the magnetic field that it creates.
Even a single straight piece of wire has some inductance.
Select the geometry of your coil from the list.
Some people call it magnet wire.
Resources eis inductance calculator.
One formula for inductance is as follows.
