In 1974 Blaschke and Hasse introduced the so called eld-oriented method for the control of induction motors [1, 5]. This method is based on a nonlinear coordinate change, admitting a clear physical interpretation since corresponding to a rotation by the rotor ux angle. In these coordinates the equations of the induction motor are very similar to the equations of a DC motor. Since the control of...

In this paper, Artificial Neural Network (ANN) technique has been used for the estimation of voltage THD (Total Harmonic Distortion), current THD and power factor, mainly from input and output measurements of five different chorded induction motors fed from a pulse width modulation inverter voltage supply. A sinusoidal pulsewidth modulation (SPWM) inverter feeding five different chorded three-p...

Induction motors constitute a theoretically interesting and practically important class of nonlinear systems. They are described by a fifth-order nonlinear differential equation with two inputs and only three state variables available for measurement. The control task is further complicated by the fact that induction motors are subject to unknown (load) disturbances and the parameters are of gr...