The design of power filters can generally be considered from two aspects:
If the common mode choke reaches saturation, the emission will increase as the input surge increases. If the common mode choke reaches strong saturation,
In the special case of ring common mode inductors, the differential current density in each lead can be assumed to be equal and opposite in direction.
The design of power filters can usually be considered from both common mode and differential mode perspectives.
If the common mode choke reaches saturation, the emission will increase as the input surge increases.
Assuming that the current density J generates a magnetic field H,
