The use of the Direct Control of Stator Flux and Kalman Filter for the Direct Torque Control of Induction Machine

Abstract

The direct torque control is a good solution to problems related to robustness and dynamics encountered in vector control with rotor flux oriented. The current research is directed towards improving the performance of this technique, whose the main problems are the evolution of the switching frequency, the ripples on the torque, on the flux and on the current. In this paper, the main object is the development of a structure for the direct torque sensor using the extended Kalman filter in order to estimate the mechanical speed. The simulation results show that this filter have a good performance (robustness) for different variations of the load and the noise measurement.