Detailed explanation of the inductor energy storage formula

How do you calculate energy stored in an inductor?

The energy stored in an inductor can be expressed as: where: W = Energy stored in the inductor (joules, J) L = Inductance of the inductor (henries, H) I = Current through the inductor (amperes, A) This formula shows that the energy stored in an inductor is directly proportional to its inductance and the square of the current flowing through it.

How is energy stored in an inductor proportional to its inductance?

This formula shows that the energy stored in an inductor is directly proportional to its inductance and the square of the current flowing through it. If the current through the inductor is constant, the energy stored remains constant as well.

When does the energy stored in an inductor remain constant?

When the current remains constant, the energy stored in the magnetic field is also constant. The voltage across the inductance has dropped to zero, so the power p = vi is also zero.

Where is the energy stored in an inductor?

Unlike resistance, inductance cannot convert this energy into heat or light. Instead, the energy is stored in the magnetic field as the rising current forces the magnetic lines of force to expand against their tendency to become as short as possible—somewhat as a rubber band stores energy when it is stretched.

How is inductance measured?

Inductance is measured in henries (H) and depends on factors such as the number of turns in the coil, the coil’s geometry, the spacing between the turns, and the core material (if any). The energy stored in an inductor is due to the magnetic field created by the current flowing through it.

What are inductors used for?

Inductors are passive electronic components that store energy in their magnetic field when an electric current flows through them. They are often used in electrical and electronic circuits to oppose changes in current, filter signals, and store energy.