What is the main function of inductor?
Inductors are typically used as energy storage devices in switched-mode power devices to produce DC current. The inductor, which stores energy, supplies energy to the circuit to maintain current flow during “off” switching periods, thus enabling topographies where output voltage exceeds input voltage.
How does iron core increase inductance?
Iron core has high magnetic permeability. A material with high magnetic permeability will have high magnetic flux for a given magnetic field force. Greater the permeability of the material used greater is the inductance.
What is the function of variable inductor?
A variable inductor lets the user control the inductance by changing the position of its ferrite core. Moving the core deeper into the coil increases the permeability, which increases the inductance.
What is iron core inductor?
The iron core inductors have a very low value of inductance. In the iron core inductor, by using iron core the inductance value of an inductor can be increased. The iron core inductor is the fixed value inductors which have an iron core placed inside the coiled.
What is ferrite core inductor?
A Ferrite Core Inductor is a passive two terminal electrical component that resists change in electric current passing through it. It uses ferrite as a main core material which has high magnetic permeability and high electrical resistivity. It is normally used with power supplier and power management applications.
What affects inductance of an inductor?
Inductance is affected by how much wire is in the coil and how close the turns are to each other. If you add more wire, by either making the diameter of the coil larger or adding more turns of wire, the inductance increases. Placing the turns closer together also increases the inductance.
What is variable core inductor?
Variable inductor products are coil products that allow the inductance to be easily varied by changing the position of the ferrite core in a threaded structure. The interior is covered by a metal case that is magnetically shielded, while a resin molded structure protects the windings with a high degree of reliability.
Where are air core inductors used?
The air core inductor is used in filter circuits. It is used to ensure a lower peak inductance, but also reduces the energy losses associated with ferrite inductors. It is used in high frequency applications including TV and radio receivers.
What is the difference between air core and iron core inductor?
Air Core Inductors- The term “air core inductors” is used to describe all inductors that do not use ferromagnetic material in their cores. Iron Core Inductors- As their name suggests, iron core inductors use magnetic cores of iron or ferrite.
Where are iron core inductors?
Iron Core Inductors are often used for low frequency applications, including:
- Audio equipment.
- Industrial power supplies.
- Power conditioning.
- Inverter systems.
- Rapid transit.
What happens when inductor is connected to DC?
The inductor works on the principle of changing electric flux. When DC is used in an inductor there will be no change in magnetic flux since DC does not have zero frequency. Therefore, the inductor acts as a short circuit in DC.
How do you increase the inductance of an inductor?
As well as increasing the number of coil turns, we can also increase inductance by increasing the coils diameter or making the core longer. In both cases more wire is required to construct the coil and therefore, more lines of force exists to produce the required back emf.
What kind of inductors are used in iron core?
Iron Core Inductors are available in a range of sizes, including compact models that function at high capacities. Using high grade electrical steel, these inductors are constructed with copper winding around a core with an air gap.
How does an air core affect an inductor?
The air core inductance range values is limited. In order to increase the inductance value of an inductor, an iron core is placed inside of it. This iron core has very special magnetic characteristics. What they do is to reinforce the magnetic field.
Which is the best description of an inductor?
Depending on the type of material used inductors can be classified as follows: As the name suggests the core of this type of inductor is made of iron. These inductors are low space inductors that have high power and high inductance value. However, they are limited in high-frequency capacity.
How is line of flux produced in iron core inductor?
The construction diagram of iron core inductor is shown in above figure. The line of flux is produced by A.C., when iron core is placed inside a coil. This coil finds a much easier path through the iron core and do not tend to leak to the outside of the core.