Author(s)

Ezio Santini

Abstract

This paper presents a FEM approach for the one-step numerical evaluation of the potential and of the integral currents in low-frequency magnetic field problems relevant to electrical devices having whatever topological connection of the windings. A analytical model is deduced and a FEM discretisation method is applied, leading to a unsymmetrical algebraic system of equations where the unknowns are the vector potential in the interpolatory nodes and the total measurable currents in the conducting regions. A technique for deriving adequate transformation matrices is shown, such that the final algebraical formulation is symmetrical and moreover solvable by

Keywords