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Performance Analysis of Current Source Inverter Fed Induction Motor Drive with Direct Torque Control

R.Chidanandappa, Dr.T.Ananthapamnabha

Current Source Inverter (CSI) fed induction motor drives finds application in high power medium voltage drives such as fan drives, where fast dynamic response is not needed because of the inherent four quadrant operation and reliability. Speed control of induction motors by Direct Torque Control -DTC method has more advantages compared to other methods. The most important Constant – Switching of DTC with PI control method based on constant switching frequency with modification of the inverter optimal switching table is presented. By using Direct torque control method the torque and speed response can be improved and thus improving the performance of the machine. The Matlab/Simulink software is used to model the CSI fed induction motor drive with DTC control and performance parameter are analysed and compared.