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Evaluates a direct torque control method for induction motors, suggesting enhanced performance in specific applications.
In this paper a new direct torque control (DTC) scheme for induction motor drives is described based on the linear state feedback method with dynamic output feedback. The DTC has been shown to be a good solution in torque controlled drives applications when the speed control is not required (e.g. traction drives for electric vehicles). In such cases, the torque command comes directly from the user input. By considering the torque and flux as the outputs of the linearized motor model, it is possible to design an optimum controller with constant gain state feedback and dynamic output feedback through an integral term. The design procedure of the proposed control scheme is described and the simulation results are presented to show the overall performance of the system.
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Kandianis et al. (2002) studied this question.
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