Advanced Direct Field Oriented Control Based Third Order Sliding Mode Speed Control for Induction Motor

Abstract

This work presents a robust Third Order Sliding Mode Speed Control (TOSM-SC) for an Induction Motor (IM) using Direct Field Oriented Control (DFOC). The DFOC method is commonly applied to the four control loops managing currents, rotor flux, and rotor speed, employing standard Proportional Integral (PI) controllers. The primary objective of this study is to replace the standard PI controller used for rotor speed with the proposed TOSM-SC controller. The aim is to enhance the overall performance of the control system, with a particular focus on improving tracking accuracy and robustness against uncertainties and external disturbances. In comparison to the standard DFOC-based PI technique, simulation results in the Matlab/Simulink environment demonstrate that the DFOC-based TOSM-SC achieves the desired reference speed promptly and without overshooting. This accomplishment is attained while maintaining the system's resilience and precise control.