Fuzzy Logic Controller for Sensorless Direct Torque Control of an Induction Motor Driven by a Matrix Converter

Résumé fourni par la source

The direct torque control has become one of the control techniques used for high performances.The major drawback of this strategy is its high torque ripples.This paper proposes the use of matrix converter to reduce the electromagnetic torque ripples, by suitably selecting switching configuration.This switching strategy combines the advantages of matrix converter with the advantages of direct torque control technique, using a fuzzy speed controller and MRAS speed estimator.A speed controller is designed according to the concept of fuzzy logic, to provide a good robustness to the variations of mechanical parameters.A MRAS speed estimator is also used in order to avoid the implementation of a incremental encoder.The obtained results with Matlab-Simulink show the effectiveness of the proposed system.

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