Inductor Coil

Solution

In circuits, commonly used inductor coils are classified into several categories:

By inductance type: fixed inductors and variable inductors. By core material: air core coils, ferrite core coils, iron core coils, and copper core coils. By function: antenna coils, oscillator coils, choke coils, notch filter coils, and deflection coils. By winding structure: single-layer coils, multi-layer coils, honeycomb coils, tightly wound coils, spaced wound coils, basket-weave coils, and random wound coils.

The primary performance indicator of an inductor coil is its inductance. Additionally, the wire used to wind the inductor coil generally has a certain resistance, which is usually very small and can often be neglected. However, in circuits where large currents flow, this small resistance cannot be ignored because the large current can cause power dissipation in the coil, leading to heating or even burning. Therefore, sometimes the power handling capability of the coil must also be considered.