An inductor is usually constructed as a coil of conducting material, typically copper wire, wound on a magnetic core in the form of air or ferromagnetic material. Core material which has a higher magnetic permeability of the air increases the magnetic field and keep it close to the inductor, thereby increasing the inductance of the inductor. Low-frequency inductor is made by using a steel laminate to suppress eddy currents.
Usually used as a soft ferrite core inductors Ultra, because ferrite does not cause power loss at high frequencies such as the iron core. This is because ferrite has a curved narrow hysteresis and high resistivity prevents eddy currents. Inductors made with various shapes. Most are constructed by winding copper wire around the core material by email legs or wire terminal exit.
Several types of closed filled rolls of wire inside the core material, called inductor veiled. Some inductors have a core that can be changed is located, which allows changing the inductance. Inductors are used to withstand very high frequencies are usually made by wrapping the tube or ferrite beads on the wire transmission. Small inductors can be printed directly on a printed circuit board to create a spiral-shaped copper lines.
Some inductors can be formed on an integrated circuit using the core planar defense minister. But the small size limits the inductance. And gyrator can be an alternative option.
Figure 3.7 Construction Inductor
Various core inductors are generally distinguished by who wore, namely:
1) Inductor-core-air / air-core inductor
2) Inductor-radio-frequency / radio-frequency-inductor
3) Inductor-core-ferromagnetic / ferromagnetic-core inductor
4) Inductor-Variable / Variable-inductor
5) Inductor-core-Laminates / Laminated-core inductor
6) Inductor-toroidal-core / core-inductor Toroidak
7) The inductor-ferrite-core / Ferrite-core inductor
The ability of an inductor to resist any change in current is a measure of self-inductance of a coil. For practical purposes is usually just referred to as inductance that is symbolized by the letter L. Inductance is measured in units of Henry. The inductor is a magnetic coil with a variety of sizes designed to produce a number of inductance values. To increase the inductance value, commonly used ferromagnetic material.