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Performance analysis of control schemes for direct torque control of dual three-phase induction machine

In this paper performance analysis of Direct Torque Control (DTC) schemes for control of dual three-phase induction machine is presented. Several hysteresis comparator based DTC schemes with variable switching frequency and a space vector modulation based DTC scheme with constant switching frequency are under the scope. The schemes are modeled and systematically analyzed by intensive computer simulations. The results of these two DTC approaches are compared. Criteria for performance analysis are quality of torque control, x1-y1 subspace copper losses and simplicity of implementation.