Nonorthogonal PEEC Models

The fundamental techniques for constructing the nonorthogonal partial element equivalent circuit (PEEC) models are similar to the orthogonal ones. It is clear that one of the more complicated parts for the nonorthogonal shape modeling is the coordinate system that represents the geometry. This chapter deals with the description of the geometrical objects that can be orthogonal and/or nonorthogonal. The main purpose of the local coordinates is to facilitate the evaluation of PEEC circuit elements the nonorthogonal partial inductances, potential coefficient, and the resistances. For nonorthogonal geometries, the partial element evaluations are more challenging. The chapter presents a nonorthogonal version of the volume filament (VFI) skin‐effect model for conductors with a constant thickness. It considers the continuity equation and Kirchhoff's current law (KCL) for the rectangular PEEC models. The chapter also presents the analytical evaluation of the zero thickness integrals for quadrilateral cells located on a plane.