What are the main parameters of the inductor?

Last Update Time: 2018-12-01 10:11:07

What are the main parameters of the inductor?

( 1 ) Inductance of the main parameters of the inductor.

The inductance is an important parameter of the inductor, and the unit is Henry ( H ). The commonly used units also have the milliheng ( mH ) and the Weiheng ( H ), and the relationship between them is : 1H = 103mH = 10H. The magnitude of the inductance is related to the number of turns of the inductance coil, the cross-sectional area of the coil ( the size of the coil ), and the core or core in the coil. For the same type of coil, the more turns, the greater the inductance; a coil having the same number of coils, with a core ( core ) having a greater inductance than that without a core.

Rated current. Rated current is the maximum allowable working current that is allowed when the inductor is working normally. If the operating current is greater than the rated current, the inductor will change the parameters because of fever, and will be burned seriously.

 Distribution Capacitance. The distributed capacitance of the coil is the capacitance between the turn and the turn of the coil, between the coil and the ground, between the coil and the shield, which are small, but when the coil works in the high frequency band, the influence of the distributed capacitance can not be ignored, and they will affect the stability and quality factor Q of the coil, that is, the Q value, so the smaller the distribution capacitance of the coil, the better. The inductive reactance refers to the inductance coil's special ability to block alternating current, which is expressed by X.. X2xr1. Xi is the inductive reactance, unit " 0 " : 1 frequency, the unit is Hertz ( H2 ); l inductance, the unit is Henry ( H ). From the formula, the larger the L, the higher the f, the greater the X. 5 Permissible error. The allowable error of inductance, I and M, are 5 %, 10 % and 20 % respectively.

( 2 ) The method of marking inductor in inductor includes direct marking method and color ring marking method. Direct tagging. The direct annotation method is that the main parameters of the inductor, such as the inductance, the error value, the maximum direct current working current, are directly marked on the outer shell of the inductor. For example, the inductor shell is marked with a 6. 8 mH. A. II standard, indicating its inductance is 6. 8 mH, and the error is Class II ( 10 % ), the maximum operating current is A block ( 50mA ). 2 Color Ring Annotation. The color ring labeling method is that the outer shell of the inductor is printed with various color rings to mark its main parameters, and the corresponding relationship between color and number is the same as the color ring resistance mark their corresponding relationships are shown in Table 3-3 and Figure 3-2.