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DIRECT TORQUE CONTROL FOR INDUCTION MOTOR DRIVES …

DIRECT TORQUE CONTROL FOR INDUCTION MOTOR DRIVES MAIN FEATURES OF DTC Decoupled CONTROL of TORQUE and flux Absence of mechanical transducers Current regulator, PWM pulse generation, PI CONTROL of flux and TORQUE and co-ordinate transformation are not required Very simple CONTROL scheme and low computational time Reduced parameter sensitivity BLOCK DIAGRAM OF DTC SCHEME ss*+_InductionMotorSelectionVoltageT* sssvsissEstimatorStatorFluxEstimatorTorq ue+_s s+_VectorT ssT2323aSSbScEiaib In principle the DTC method selects one of the six nonzero and two zero voltage vectors of the inverter on the basis of the instantaneous errors in TORQUE and stator flux magnitude.

DIRECT TORQUE CONTROL FOR INDUCTION MOTOR DRIVES MAIN FEATURES OF DTC • Decoupled control of torque and flux • Absence of mechanical transducers

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  Control, Direct, Torque, Direct torque control

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