CONTRIBUTION TO THE TRANSIENT ANALYSIS OF INDUCTION MOTORS SOLVING THE ELECTRODYNAMIC EQUATIONS BY USING THE FINITE ELEMENTS METHOD

This paper details how the equations describing the magnetic field inside the motor and the equations of its electric circuit can be integrated in one only system, which can be solved using the Finite Element Method (FEM). When a model of a circuit is used, the solution of the magnetic field equation is the input to calculate the currents of the machine windings. As the magnetic field depends on these currents, it is necessary to follow an iterative process until initial and final currents match. With the technique proposed in this paper, because both magnetic field equations and electric circuit equations are integrated in the system, just in one step, the currents and induced voltages can be obtained with high accuracy and considerable time saving.