What is Variable Inductor

Variable inductor are coil products that can easily change the inductance by changing the position of the ferrite core in the thread structure.

 

The most common design of a variable inductor is one with a movable ferrite core. Moving the core along the windings increases or decreases the permeability, which affects the inductance of the inductor. Cores can be designed to slide or screw in or out of the coil.

 

 

A variable inductor lets the user control the inductance by changing the position of its ferrite core. Moving the core deeper into the coil increases the permeability, which increases the inductance. Moving the core further out of the coil lowers the permeability and, consequently, the inductance. Variable inductors are commonly used in radio and other applications that require specific tuning. A variable inductor is also used in highly sensitive applications since a fixed inductor may not be perfectly aligned in these situations.