Inductance calculations using partial inductances and macromodels

Partial inductances as opposed to conventional loop inductances allow the decomposition of effects into their constituent parts. This leads to a complete analysis of complicated three dimensional structures. Coupling between parts of the structure is normally ignored in a conventional lumped circuit analysis. Macromodels of electric circuit substructures obtained from partial (inductance) equivalent circuit (PEEC) may be inserted into overall models and thereby contain more detailed effects than ordinary inductance models. We also show that the coupling is greatly reduced for some structures like transmission lines with differential mode currents.