Common types of inductors

Inductance can be made by winding a magnetic core with conductive materials, such as copper wire. The magnetic core can also be removed or replaced with ferromagnetic materials. Core materials with higher magnetic permeability than air can tightly constrain the magnetic field around the inductive components, thereby increasing the inductance. There are many types of inductors, most of which are made by wrapping an enamel coated wire around a ferrite spool, while some protective inductors completely place the coil inside the ferrite body. The core of some inductive components can be adjusted. This can change the inductance size. Small inductors can be directly etched onto PCB boards using a method of laying spiral trajectories. Small value inductors can also be manufactured using the same process as transistors in integrated circuits. In these applications, aluminum interconnects are often used as conductive materials. Regardless of the method used, the circuit most commonly used based on practical constraints is called a "rotator", which uses a capacitor and an active component to exhibit the same characteristics as an inductive component. Inductive components used for high-frequency isolation are often composed of a metal wire passing through a magnetic column or bead.
Small inductor
Small fixed inductors are usually made by directly winding enameled wires on the magnetic core, mainly used in circuits such as filtering, oscillation, notch, delay, etc. They have two packaging forms: sealed and unsealed, and both have vertical and horizontal appearance structures.
1. Vertical sealed fixed inductor adopts coaxial pins, with a domestic inductance range of 0.1-2200 μ H (directly labeled on the casing), with a rated working current of 0.05-1.6A and an error range of ± 5%~± 10%. The imported inductance has a larger current range and a smaller error. The TDK series color coded inductors are imported, and their inductance is marked with color dots on the surface of the inductors.
2. Horizontal sealed fixed inductor adopts axial pins, and there are LG1. LGA, LGX and other domestic series.
The inductance range of the LG1 series inductor is 0.1~22000 μ H (directly marked on the casing)
The LGA series inductors adopt a subminiature structure, similar in appearance to a 1/2W color ring resistor, with an inductance range of 0.22-100 μ H (marked with a color ring on the casing), with a rated current of 0.09~0.4A.
The LGX series color coded inductors are also small packaged structures, with an inductance range of 0.1~10000 μ H. The rated current is divided into four specifications: 50mA, 150mA, 300mA, and 1.6A.