What is common-mode inductance, and what are the differences between common-mode inductance and differential-mode inductance? 2

The working principle of common mode inductance mainly involves the interaction between electromagnetic induction and magnetic field. When current passes through the main winding, a magnetic field is formed inside the main winding. At this point, if a common mode interference signal exists simultaneously on both the main winding and the secondary winding, this interference signal will generate induced electromotive force on the secondary winding, thereby forming a current on the secondary winding. This current will generate a reverse magnetic field that interacts with the magnetic field inside the main winding, thereby canceling out common mode interference signals and achieving suppression.

2、 Characteristics of common mode inductance

1. Suppress common mode interference signals

The main characteristic of common mode inductance is that it can suppress common mode interference signals. Common mode interference signal refers to the interference signal that exists simultaneously on two signal lines in a circuit. This signal can affect the normal operation of the circuit, such as reducing signal quality, increasing errors, etc. Common mode inductance can suppress common mode interference signals through the principle of electromagnetic induction and magnetic field interaction, thereby improving the quality and reliability of signals.diode

2. Differential mode conversion

Common mode inductors can also achieve differential to analog conversion through circuit design. Differential mode conversion refers to the process of converting a common mode signal into a differential mode signal, thereby improving the quality and reliability of the signal. Differential mode signal refers to the difference between two signals, while common mode signal refers to the average value between two signals. By designing common mode inductors, it is possible to convert common mode signals into differential mode signals, thereby better suppressing interference signals.

3. High inductance value

The inductance value of common mode inductors is usually larger than that of ordinary inductive devices. This is because common mode inductors need to have sufficient inductance values in order to suppress common mode interference signals and perform differential mode conversion. Common mode inductors with high inductance values typically require the use of multi-layer winding and high permeability materials to achieve efficient suppression and conversion.

4. Small size

Although the inductance value of common mode inductors is usually large, their size is relatively small. This is because common mode inductors usually use multi-layer winding and tight winding methods to achieve higher inductance values and size compression. In addition, the size of common mode inductors can be adjusted through material selection and design optimization.

3、 Application areas of common mode inductors

1. Power supply

Common mode inductors can be used in power supplies to suppress common mode interference signals on power lines. The common mode interference signal on the power line can affect the output quality and stability of the power supply, thereby affecting the normal operation of the entire circuit. Common mode inductance can improve the output quality and stability of the power supply by suppressing common mode interference signals.

2. Communication

Common mode inductors can be used in communication to suppress common mode interference signals on communication lines. Common mode interference signals on communication lines can affect the quality and reliability of communication signals, thereby affecting the normal operation of communication. Common mode inductance can improve the quality and reliability of communication signals by suppressing common mode interference signals.

3. Computer

Common mode inductors can be used in computers to suppress common mode interference signals on computer circuits. Common mode interference signals on computer circuits can affect the normal operation of computers, such as causing them to crash or crash. Common mode inductance can improve the stability and reliability of computers by suppressing common mode interference signals.  diode