Speed Performance of SOS Algorithm Based DTC of Induction Motor

ABSTRACT This paper presents a method for improving the speed performance of 3-phase induction motorusing direct torque control (DTC) based on symbiotic organism search (SOS) optimization technique. In conventional direct torque controlled induction motor drive, there is usually undesired torque and flux ripple.So Tuning PI parameters (Kp and Ki) are essential to DTC system to improve the performance of the system.In this work, symbiotic organism search optimization is proposed to adjust the parameters (Kp and Ki) of the speed controller in order to improve the performance of the system, and run the machine at rated speed. The speed control of the IM is done by using the conventional DTC proportional integral controller and SOS controller. The effect of variation of the speed has been clearly tested for both conventional and SOS based speed controllers. The simulation results shows a better performance of the induction motor whenusing the DTC based on SOS in comparison with conventional DTC. Also, the SOS based DTC has improved the speed performance of the IM over a wide range of operating conditions.