Fixed inductors refer to a type of electrical inductive device that possesses a fixed inductance. They feature a fixed coil that remains winded over a magnetic core and is covered with plastic or epoxy resin depending on the inductance as well as the maximum operating voltage.
Fixed inductors are typically lightweight, have a compact size, and have a stable structure, and provide a significant advantage in installation and usage. This type of conductor comes in two packaging options; sealed and non-sealed, and is chiefly used in electrical circuits that require filtering, trapping, oscillation and delay.
How does a fixed inductor work?
A fixed conductor possesses coils made from materials with high conductivity, like copper or aluminium. The coils are wound around a ferrous core which generates a magnetic field in the inductor. When an electric current is applied to the inductor, the magnetic field simultaneously changes and creates an electromotive force against the current. This phenomenon produces a voltage in the opposite direction of the current and generates inductance.
Fixed inductors have extensive uses in a variety of applications. Most commonly, they are used in: