inductance1.3

1.3 Inductance coil of inductor is wound around the insulating tube by wire, and the wires are insulated from each other, and the insulating tube can be hollow, it can also contain an iron core or a core, or inductance. Using L, they have Henry ( H ), mH ( mH ), micro Henry ( H ), 1H = 10 degree mH = 10 degree H.
Classification of Inductance
1 ) Classification by Inductance : fixed Inductor and Variable Inductance.
2 ) According to the nature of the magnet, the hollow coil, the ferrite coil, the core coil and the copper core coil are classified.
3 ) Classification by nature of work : antenna coil, oscillating coil, choke coil, notch coil and deflection coil.
4 ) Classification by winding structure : single-layer coil, multilayer coil, and honeycomb coil.
5). Classification of flake inductors: low power inductors and high-power inductors. Small power inductors mainly include wire wound chip inductors, multilayer chip inductors, and high-frequency chip inductors. High power inductors are mainly wire wound.
Two. The main parameters of inductors are winding inductors with large inductors.
(1). Inductance L inductance L represents the inherent figure of the coil itself 1-55 the shape of the common sheet inductor.
The size of the current is independent of the size of the current. In addition to a special inductance coil (color code electricity)
Inductance is usually not specified on the coil, but is marked by a specific name.
(2). Inductance XL inductance coil to AC current blocking effect is called inductance Xr, unit is Ohm. It is related to the inductance L and the alternating current frequency f to XL =2 PI fL.
(3). Quality factor Q quality factor Q is a physical quantity representing the quality of the coil. Q is the ratio of XL to resistance, that is, Q=X, /R. The higher the Q value of the coil, the smaller the loss of the loop. The Q value of the coil is related to the DC resistance of the wire, the dielectric loss of the skeleton, the loss caused by shield or core, and the influence of high frequency skin effect. Coils
Q values are usually tens to hundreds.
(4). The capacitance between the turn and turn of the distributed capacitance coil, between the coil and the shield, between the coil and the bottom plate is called the distributed capacitance. The existence of distributed capacitance causes the Q value of the coil to decrease and the stability becomes worse, so the smaller the distributed capacitance of the coil is, the better.
Three, the model naming method of inductor
The model of an inductive element is usually made up of 4 parts. The first part is called the main name in letters, in which L represents inductance coil, and ZL represents a choker; the second part is characterized by letters, of which G represents high frequency; the third part is expressed in alphabetical form,
Among them, X stands for small; the fourth part uses difference numbers or letters to indicate the difference code.
For example, the LGX type is a small high frequency inductance coil.
This article is from ALLICDATA ELECTRONICS　LIMITED.