Alternative PEEC modeling with partial reluctances and capacitances for power electronics applications

Today power electronic design has to account for the interconnection structure. The method of partial elements (PEEC) is a suitable tool to describe arbitrary 3D interconnections. In engineering applications the number of volume and surface cells quickly becomes prohibitively high, due to the huge number of partial inductances and potential coefficients. Therefore, more efficient approaches are needed, It is possible to formulate the couplings in terms of partial reluctances and capacitances as the inverted matrices for the partial inductances and potential coefficients. The advantage of this modeling technique is based on the dominance of the diagonal matrix elements, so that very small values can be ignored under reservation of the passivity of the interconnection structure. Furthermore, one can derive a SPICE compatible circuit without the need for further tools. In this paper a suitable reduction procedure and implementation of the PETC models with reluctances; and capacitances are presented. The accuracy of the simulation results depending on the model reduction is discussed on a typical power electronics application.