A NONLINEAR VOLTAGE DRIVEN FIELD APPROACH FOR THE ANALYSIS OF CLOSED SLOT INDUCTION-MOTORS

The paper presents a Finite Element approach for the solution of volta ge driven nonlinear electromagnetic field problems under periodic supp ly conditions. The formulation includes the field and circuit equation s using as unknowns the nodal values of magnetic vector potential and the currents in the branches of electric circuits. The problem, linear ized by the iterative Fixed Point technique, is solved in the frequenc y domain. The formulation is applied to the analysis of a closed slot induction motor under shun circuit test conditions, considering severa l values of supply frequency and voltage. The computational results ar e compared with measurements.