Modified nodal analysis applied to electric circuits coupled with FEM in the simulation of a universal motor

In the last few years, several papers considering the finite element method coupled with electric circuits were published. Many of these works have been used the theory of mesh analysis to analyze the electric circuit. However, when we use a circuit with many current and voltage sources, it is not always easy to use this analysis. Aiming to avoid this problem, this paper presents the application of the modified nodal analysis in the analysis of coupled circuits, as a continuation of the previously presented work, where the use of nonlinear ferromagnetic devices was not considered. The analysis of a universal motor at stall is presented to validate this new approach.