you need
  • material coil and its geometric parameters
Guide
1
inductance coil proportional to the linear dimensions coil , the magnetic permeability of the core and the square of the number of windings. inductance coil , wound around the toroidal core, is: L =? 0 *? R * s * (N ^ 2) / l.In this formula,? 0 - magnetic constant which is approximately equal to 1.26 * (10 ^ -6) H / m,? R - relative magnetic permeability core material, which depends on the frequency), s - sectional area of ​​the core, l - lengththe center line of the core, N - the number of turns of the coil .
relative magnetic permeability and the material and the number of turns N are dimensionless quantities.
2
Thus, inductance coil greater, the larger the area of ​​its cross s
ection.This condition increases the magnetic flux through the coil in one and the same current therein. inductance coil uH inductance can be calculated as the formula: L = L0 * (N ^ 2) * D * (10 ^ -3).Here, N - is the number of turns, D - diameter coil in centimeters.L0 factor depends on the ratio of length coil to its diameter.For single-layer coil it is: L0 = 1 / (0,1 * ((l / D) +0,45)).
3
If chain coils connected in series and their common inductance is the sum of the inductances of the coils: L = (L1 + L2 + ... + Ln)
If coils connected in parallel,their total inductance equal to: L = 1 / ((1 / L1) + (1 / L2) + ... + (1 / Ln))