Author : Vjosa Shatri, Ruzhdi Sefa, and Lavdim Kurtaj

Performance of Partial Element Equivalent Circuit (PEEC) Toolbox for MATLAB for solving coupled electromagnetic-circuit problems is presented. Geometry of the problems to be solved is described with wire-based language, specifically designed for this toolbox, by using predefined basic elements. Meshing function will discretize geometry, or parts of it, with selected 1D, 2D, 2DS, 3D, or 3Dxyz mesh type, and will generate surface and volume cells as required by PEEC method. Choice of mesh type is trade-off between model size and accuracy. Calculation of partial elements is handled by FastCap2 and FastHenry2. Toolbox offers interface to these applications starting from discretized cells. As known to us, this is first general interface to FastCap2 and FastHenry2, and it can be used also for problems not related to PEEC. Netlist for any standard PEEC circuit model, in retarded or quasi-static version, can be created in format compatible with LTspice or Multisim circuit solver, where it can be combined with other lumped, linear or nonlinear, passive or active, components for solving combined electromagnetic-circuit problems, with netlist representing electromagnetic part. Naming convention is related to geometry construction elements and enables easy access to any internal point of model. Implementation of delayed quantities is done with LAPLACE controlled sources. Guidelines for proper selection of parameters for LAPLACE sources are given, that result in significant speedup without sacrificing accuracy. Performance of this integrating solution for PEEC solver in frequency- and time-domain is tested and results are in good agreement with results reported elsewhere. Toolbox can serve as platform for testing new approaches for any sub-step of PEEC method, while using others unchanged.

Keywords: Coupled Electromagnetic-Circuit Problems, Geometry Description, Partial Element Calculation, PEEC Toolbox, Wire-Based Language, FFT Window Length, Parallel-Plate Transmission Line.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.4(Oct- 2013)