How to determine the common-mode inductance of a switching power supply, judging by the resistance value 2

In practical applications, the selection and evaluation of common mode inductors need to consider the following key parameters:

1. Impedance: The impedance value of a common mode inductor is an important parameter for measuring its effectiveness in preventing common mode noise. Usually measure its impedance value at a specified frequency, such as 100kHz.

2. Rated Current: Common mode inductors need to be able to withstand the maximum current passing through them without causing overheating or core saturation.diode

3. DC Resistance (DCR): Low DC resistance helps reduce power loss and improve efficiency.

4. Insulation Resistance: Insulation resistance reflects the insulation effect between the winding of a common mode inductor and the magnetic core.  diode