Commande Dtc-svm Prédictive D’un Moteur Asynchrone A Cage Sans Capteur Mécanique

Résumé: The asynchronous motor by its undisputed advantages (simplicity of design and maintenance, low cost and especially absence together brooms – manifold), the motor is by far the most used in industry. However the development of systems using asynchronous motors operating at variable frequency was possible thanks to semi –conductor power of high performance, which constitute the static converters associated with control systems. The introduction of DTC control in the eighties mid has opened a new horizon in the field of control. However, in the classical DTC control leads to oscillations in torque and flux. The work proposed in this thesis focuses on the direct torque control of Asynchronous Motor. We will strive to improve this type of control to reduce the oscillations of torque and flux. To accomplish this goal we have developed the DTC method based on switching table and hysteresis, we have developed the DTC based on constant frequency, we will be working at a constant inverter switching frequency using PI predictive controller. To overcome the robustness we have included improved DTC-SVM by using of an observer based on the Extended Kalman filter (EKF) for the speed estimation

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