As stated on the previous page, the static values of differential mode inductance = 2*LK and Common Mode inductance = LM can now be determined. However, it is still necessary to determine the flux density in each portion of the core to ensure that part will not saturate. Using Millman’s Theorem it is possible to derive these values as shown above. These flux values can be verified by analyzing the extreme conditions. First, if looking at a very tightly coupled CMDM component where LK would approach zero then the DC flux goes to zero and there will be no saturation which is the same as previously derived for standard common mode choke. Second, if looking at a very loosely coupled CMDM component where LM approaches zero then the DC flux approaches LK/N*I, which is the same as previously derived for a standard differential mode choke. Based on the above and proceeding equations, the CMDM component can now be designed and compared to individual components.