As with capacitors, we can also vary the inductance of an inductor by changing the material that fills its core. Thus, we can have inductors with air core, ferrite or other ferromagnetic material.
It should be emphasized that when an electric current, of any nature, circulates
by winding the inductor, it generates a
By definition, the inductance of an inductor is given by:
In circuit analysis, the voltage in the inductor always has a polarity opposite to the source that generated it, and so the average voltage on the inductor is:
This equation means that if there is no variation in the electrical current circulating by the inductor,
so the voltage in your terminals will be equal to
Here we also have three types of inductor associations that we can find in
electrical circuits. The Associations
3.1. Association Series
What characterizes a
In the
Of course we can generalize to
3.2. Association Parallel
What characterizes a
In the
3.3. Association Mixed
In the
As well as capacitors can store energy in the
In this item, we will see what is the behavior of an
Below, one of the fundamental properties of an inductor is described.
Based on the property above, the inductor assumes special characteristics when subjected to
variations of electrical current in its terminals. Normally, a serial resistor is used with
the inductor to limit the electrical current circulating through it. So, when the inductor
is subjected, abruptly, to a variation of electrical voltage, it behaves like an
In this circuit, we have a
The speed with which the electrical current circulates in the inductor, depends on the
values of the inductor
By applying,
When the circuit starts to drive electric current, it rises rapidly
at the beginning of the driving and reaches the final value of
Watch out for the fact that when the time grows, the current in the circuit tends to the final
value
This was a brief approach to the behavior of an inductor when it is in a circuit that uses only continuous current. We'll soon be dealing with more depth this problem by using the solution of differential equations, as well as demonstrating where the above equations arose.