Inductance is a passive electronic component that can store electrical energy in the form of magnetic flux. Usually the wire is wound. When a current flows, a magnetic field is generated from the right side of the current flowing direction.
How does the inductor work?
The formula for calculating the inductance value is shown below. The more the number of windings, the stronger the magnetic field. At the same time, increasing the cross-sectional area or changing the magnetic core can increase the magnetic field.
Let's take a look at what happens when the AC current flows through the inductor. Alternating current refers to the current whose magnitude and direction change periodically over time. When the alternating current passes through the inductor, the magnetic field generated by the current cuts the other windings, thereby generating a reverse voltage, which hinders the current change. Especially when the current suddenly increases, the electromotive force in the opposite direction of the current, that is, the direction of the current decrease, will be generated to hinder the increase of the current. Conversely, when the current decreases, it is generated in the direction of the current increase.
If the direction of the current is reversed, a reverse voltage will also be generated. Before the current is blocked by the reverse voltage, the direction of the current will be reversed, so the current cannot flow.
On the other hand, since the current does not change in direct current, there will be no reverse voltage, and there is no danger of short circuit. In other words, an inductor is a component that allows direct current to pass, but not alternating current.