What is Inductor? Inductor definition: An inductor is an energy storage device which stores energy in form of magnetic field or An inductor is a passive electrical component that thwarts the changes in electrical current that goes through it. If you want to know about inductors other than inductor definition such as theory and types of inductor, you must read this article carefully.
If a time varying current flowing through a coil there is an emf induced in it. The induced emf across the coil is directly proportional to the rate of change of current with respect to time. Due to the property inducing emf, all types of electrical coil can be referred as inductor.
Table of Contents
What is Inductor? Definition, Theory and Types of Inductor
A simple inductor is made up of a coil of wire. This coil temporarily stores energy in the magnetic field owing to the resistance to change of the inductor. This provides stabilization to an electrical supply.
Inductors are used in various types of power supply devices, as well as in capacitors and wireless communication setups. There is also some research on how induction can be used to facilitate wireless charging, where electromagnetic energy may be beamed from one station to another over the air.
Types of Inductor
There are two types of Inductor, are self induction and mutual induction.
When time varying current flows in a coil the time varying flux is produced and this varying flux will link with that coil itself and as a result there will be emf induced in the coil itself. This type of Inductor is called self induction.
When time varying current flows in a coil it produces time varying flux as we have already told. This time varying flux may link with another nearby coil. Due to this flux linkage there will be an induced emf in the second coil.
This type of electrical induction is called mutual induction. Hence mutual induction can be defined as the induction of emf in one coil due to time varying current flowing in any other nearby coil.
Theory of Inductor
A current through a conductor produces a magnetic field surround it. The strength of this field depends upon the value of current passing through the conductor.
The direction of the magnetic field is found using the right hand grip rule, which shown. The flux pattern for this magnetic field would be number of concentric circle perpendicular to the detection of current.
Now if we wound the conductor in the form of a coil or solenoid, it can be assumed that there will be concentric circular flux lines for each turn of the coil as shown.
But it is not possible practically, as if concentric circular flux lines for each turn exist, they will intersect each other. However, since lines of flux cannot intersect, the flux lines for an individual turn will distort to form complete flux loops around the whole coil as shown. This flux pattern of a current carrying coil is similar to a flux pattern of a bar magnet as shown.
Now if the current through the coil gets changed, the magnetic flux produced by it will also get changed at the same rate. As the flux already surrounds the coil, this changing flux obviously links the coil.
Now according to Faraday’s law of electromagnetic induction, if changing flux links with a coil, there would be an induced emf in it. Again as per Lenz’s law, this induced emf opposes every cause of producing it. Hence, the induced emf is in opposite of the applied voltage across the coil.
After going through the above portion of theory of inductor we can now establish a inductor definition. I hope you enjoy when reading this article, thank you.