i would like to compare the leakage inductance on the primary side of different transformer geometries. I simulated a three winding transformer with an UI Core. On one leg i have the splitted primary winding and on top one secondary winding and the same on the other leg of the core.
The result of the simulation was the inductance matrix. When I try to calculate the leakage inductance as described in "Induktivitäten in der Leistungselektronik" (Albach) I will get an negative primary leakage inductance.
As described in "Avoiding the Use of Negative Inductances and Resistances in Modeling ThreeWinding Transformers for Computer Simulations " this can be right, but I don't know how to interprete the negative inductance because I want to compare it with the other transformers. Thanks for your help.