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Common mode inductance is a kind of inductance device widely used in electronic circuits, which is mainly used to filter and isolate common mode interference in circuits. This paper will introduce the skills of common mode inductor selection in detail.

The frequency of each circuit is different. The impedance of the circuit needs to be calculated by frequency. The impedance characteristic of a common-mode inductor is that its impedance increases with increasing frequency and is more significant in the high frequency range. When designing the circuit, it is necessary to consider the inductance value and impedance characteristics of the common mode inductor to ensure that the stability and anti-interference performance of the system has reached an ideal level.

The diameter of the common mode inductor is the diameter of the wire between the main coil and the common mode coil, which is directly related to the size of the common mode inductor and the performance of the whole inductor. Therefore, the line diameter of the common mode inductor is very important to the design and selection of the inductor. When choosing the diameter of the common mode inductor, it is necessary to consider the physical distance between the main coil and the common mode coil and the signal frequency that needs to be transmitted, and it is also necessary to consider the resistance and inductive reactance of the wire. According to the specific application scenarios and needs to choose the appropriate common mode inductor wire diameter.