A Time-Stepping Volume Integral Formulation for Nonlinear Field-Circuit Coupled Problems

A B-conforming time-stepping Volume Integral Method (VIM) formulation for nonlinear 3D field-circuit coupled problems is presented in this paper. The advantage of the VIM with respect to Finite Element (FEM) that only ferromagnetic regions have be discretized, thus avoiding mesh air. It an appealing approach given it avoids numerical errors can arise from meshing direct explained, assembling a system magnetic field and circuit contributions when coils are present. An application current transformer shown, comparing FEM validate its accuracy.