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.
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))
If coils connected in parallel,their total inductance equal to: L = 1 / ((1 / L1) + (1 / L2) + ... + (1 / Ln))
Note main
parameter characterizing the properties of inductors and chokes, is inductance.The inductance of the coil depends on its size and shape, number of turns and the magnetic permeability medium..It characterizes the energy losses in the coil and is determined by the ratio of its inductive reactance to active resistance
Helpful Hint
physical nature of the inductor.Inductors have the ability to provide a reactance AC with little direct current resistance.Together with capacitors are used to create a filter that frequency selection electrical signals, as well as to create the signals of delay elements and storage elements ...
Sources:
- inductor