Grey Wolf Optimization-Based Improved Closed-Loop Speed Control for a 3-phase IM Motor Drive with SVPWM Switching and V/f Control

Abstract

Because induction motors are used in most industries, IM control is more essential, optimization techniques become more popular for the improvement in control of Three Phase Induction Motor (TIM). Also, the Volt/Hz(V/f) control and space vector pulse width modulation (SVPWM) is used to reduce the harmonics level related to other control and modulation techniques. This paper deals with the tuning of PI controller parameters to be used in TIM. Grey Wolf optimization (GWO) algorithm is used to tune each parameter of the PI speed controller to improve the speed response performance of the TIM. By designing an appropriate GWO algorithm, Kp and Ki of the PI speed controller parameters are tuned for TIM operation with SVPWM Switching and V/f Control. The performance of the PI speed controller on the TIM is measured by estimating the change of speed and torque under the speed response condition. It is found that the performance of the PI controller is robust in terms of overshoot, settling time, steady-state error, and ITAE.