What are fixed inductors?

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. 

Applications

Fixed inductors have extensive uses in a variety of applications. Most commonly, they are used in:

• Computers 
• Telecommunication equipment 
• Networks 
• AC power supplies 
• Peripheral equipment 
• Mobile communication devices
• Antenna filter circuits 
• Power circuits 
• Oscillation coils 
• Voltage-controlled oscillators 
• LC filters