Research on Space Vector Modulation-direct Torque Control for Asynchronous Motor Control Based on Full Order Flux Observation and Stator Reference Voltage Vector Calculation

To solve the problem of large flux and torque ripple in the conventional direct torque control(DTC),a new control strategy to reduce the pulse was presented.With full order flux observation and the increment of stator flux calculation,the stator reference voltage vector was calculated.According to the current stator reference voltage vector which was modulated by SVM,optimum combination of the fundamental voltage space vector was obtained in order to accurately compensate the error of stator flux and torque.The simulation results verify the effectiveness of the method.