Induktor

Inductor is a passive electronic component that is composed of wire windings. that can store energy in magnetic fields generated by electric currents pass through it. Inductor ability to store magnetic energy is determined by the inductance inductor includes components that can store electrical charges. Together with inductor capacitor can serve as a series resonator can resonate at certain frequencies.
Inductors are often used in analog circuits and signal processing.

Coil / coil is a air core, iron core or ferrite core.
The value / price of the inductor is called the basic unit of inductance with henry (H)

Function Inductors:

1. Storage of electric current in the form of a magnetic field
2. Holding currents bolak-balik/ac
3. Forwarding / pass direct current / dc
4. As a filter (filter)
5. As tuning (tuning)

Inductor type:
Coil is a coil of wire over a core. Depending on needs, which are widely used in radio is the air core and ferrite core

1. Fixed coil, namely inductor which has a price that's for sure. Usually expressed in a color code as applied to the resistor. The price is expressed in units mikrohenry (μH).
2.Variable coil, the coil with an inductance that can be changed-¬ change, changes are made by rotating the position of ferrite core. Such coils are widely used in adjustable frequency oscillator for ¬ set, coil shape is similar to the IF transformer.
3. Choke coil (coil damping), the coil used in the technique of high frequency signals.

Inductance formula

Coil cylinder





• L = inductance
• μ0 = permeability of vacuum
• K = coefficient Nagaoka
• N = number of coil
• r = radius of coil
• l = length of coil

Straight wire






• L = inductance
• l = length of wire
• d = diameter of wire

Short cylindrical air core coil






• L = inductance (μH)
• r = radius of coil (in)
• l = length of coil (in)
• N = number of coil

Winding layers of air core






• L = inductance (μH)
• r = mean radius of coil (in)
• l = length of coil (in)
• N = number of coil
• d = thickness of coil (in)

Flat spiral air core coil







• L = inductance
• r = mean radius of spiral
• N = number of coil
• d = thickness of winding

Toroid core






L = inductance
μ0 = permeability of vacuum
μr = relative permeability of core material
N = number of coil
r = radius of coils
D = she yards overall

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