Direct torque controlled dual star induction motors (in open and closed loop)

We can consider the direct torque control (DTC) as an alternative to conventional methods of control by pulse width modulation (PWM) and by Field oriented control (FOC), the direct torque control DTC found by Takahashi offers high performance in terms of simplicity in control and fast electromagnetic torque response. With dominant characteristics, the direct torque control controlled AC electric motor drive is alternative in industrial applications. This paper discusses and presents the application of direct torque control called DTC on dual-star induction motors. The most typical approach used to controlling the rotor speed is PI controller. In order to cancel the static error and reduce the response time while maintaining the stability of the system, the performance obtained (stability, accuracy, response time) are satisfactory for such an electromechanical system. However, it is frequently typified by an overshoot during start up and it depends to the machine parameters. To resolve this problem, this paper presents in second hand, an artificial neural network combined with DTC-DSIM. The main advantages of this intelligent controller does not depend on accurate system model, Indeed, the techniques based on the use of artificial neural networks have now a greater interest in the areas of control and robotic.