Research on DTC control method of reducing torque ripple and switching frequence for induction motor

When direct torque control of induction motor is implemented using microprocessor,undesired torque and current ripple happen because of the low number of voltage vector and the time delay due to the digital implementation.An improvement of DTC control method is presented.It doesn't lead to increase switching frequency and extra complexity of control system.The simulation shows the validility of the new method.