Inductors are generally composed of a skeleton, windings, shields, encapsulation materials, cores or iron cores, etc.
1, the skeleton skeleton refers to the winding of the coil support. Some of the larger fixed inductors or adjustable inductors (such as oscillation coils, current resistors, etc.), most of the enameled wire (or yarn-wrapped wire) around the skeleton, and then the magnetic core or copper core, iron core, etc. into the cavity of the skeleton to improve its inductance. The skeleton is usually made of plastic, plastic wood, or ceramic, and can be made into different shapes depending on actual needs.
Small inductors (e.g., color-coded inductors) generally do not use a skeleton, but instead wind enameled wire directly onto the core. Hollow inductors (also called stripped coils or hollow coils, mostly used in high frequency circuits) do not use cores, bobbins, shields, etc. Instead, they are first wound on a mold and then stripped off the mold, and the coils are spaced a certain distance apart from each other.
2, winding winding is a set of coils with specified functions, it is the basic component of the inductor. Windings have a single layer and multi-layer. Single-layer winding and dense winding (winding wire a circle next to a circle) and between the winding (winding between each circle of wire are separated by a certain distance) two forms; multi-layer winding layered flat winding, chaotic winding, beehive winding method and other kinds.
3, the core and the magnet bar The core and the magnet bar generally use nickel-zinc ferrite (NX series) or manganese-zinc ferrite (MX series) and other materials, it has “I” shape, column, cap, “E” shape, can-shaped and other shapes.
4, core core materials are mainly silicon steel, PoMo alloy, etc., and its shape is mostly “E” type.