In a pure inductor, the energy is stored without loss, and is returned to the rest of the circuit when the current through the inductor is ramped down, and its associated magnetic field collapses.
To define, the energy stored in an inductor is the energy induced in the magnetic field due to the flow of electric current. When a current flows through an inductor, it develops an electromagnetic field around it. This field is dynamic - meaning it changes with time and the amount of the current flowing.
How does a pure inductor work?
When an electric current i is flowing in an inductor, there is energy stored in the magnetic field. Considering a pure inductor L, the instantaneous power which must be supplied to initiate the current in the inductor is P = i v = L i d i d t The work done by the voltage source during a time interval d t is d W = P d t = i L d i d t d t = L i d i
Why is the theory of energy stored in inductor important?
Overall, the theory of energy stored in inductor has been shaped by crucial discoveries that not only made us understand how an inductor works but also how vital it is in handling energy in electrical and electronic systems, thereby revolutionising the world of technology.
What factors affect the energy stored in an inductor?
Coil Inductance: The inductance of the coil, typically expressed in henries, influences the amount of initial energy stored. The higher the inductance, the more energy an inductor can store. Current: Another vital factor is the amount of current flowing through the inductor – the energy stored is directly proportional to the square of this current.
How does inductance affect energy stored?
Higher the inductance, higher will be the energy stored. Current flowing through the coil: The energy stored is directly proportional to the square of the current flowing through the inductor. Hence, a small change in current can lead to a significant change in the energy stored.
How does resistance affect the energy stored in an inductor?
A high resistance coil will allow less current to flow, thus reducing the energy stored. Hence, resistance indirectly affects the energy stored in an inductor. In summary, both the inductance of the inductor and the current flowing through the circuit greatly influence the energy stored in an inductor.