A Novel Approach for Time Domain Analysis of Transient Currents in Conductors

摘要

Time domain solutions for electromagnetic fields in conductive media, considering complex structures, can generally be obtained only by applying numerical procedures. Aiming at the analysis of transient currents, the paper shows the application of the Moment Method in association with a finite difference approximation of time derivatives which leads to a linear system characterized by matrix-form equations. Thus, currents are determined at each chosen time step in some specific points of the spatial subdivision of the geometry being considered. When solutions are desired for transient problems involving non-homogeneous media, the static Finite Element Method can be applied in order to determine the coefficients of the problem main matrix. Examples of calculated transient current distributions in some shielding configurations are presented.