What is the main parameters and model naming method of inductors?
l The main parameters of Inductor.
(1). Inductance L
Inductance L represents the inherent figure of the coil itself.
(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.
(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=XL /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 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.
l 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.
l Identification of inductive components
1. The direct marking method uses the direct standard inductor to directly mark the nominal inductance on the outer shell of the inductor, at the same time, the rated working current is expressed by letters, and I and II are used to express the allowable deviation. The fixed inductor, in addition to directly marking the inductance, also marks the allowable deviation and rated current and other parameters.
2. Digital representation
Using three bits of mathematics, the first two represent valid values, and the next digit indicates the number 0.
The decimal point is represented by R, the unit is H.
For example, 151 is 150 mu H, and 2R7 is 2.7 micron H.
3. Colour code
The inductance element color code method is the same as the resistance element color code method.
4. Chip inductor
The small power inductance code has two units, nH and H, respectively, using N or R to represent decimal points.
For example, 4N7 represents 4. 7nH, and 4R7 represents 4.7 H.
High power inductors are sometimes printed with 680K and 220K words, representing 68 H and 22 H respectively.
If you want to know more, our website has product specifications for the inductors, you can go to ALLICDATA ELECTRONICS to get more information
Fixed inductor: 744765116A
