This paper presents the design of a hybrid fuzzy sliding mode controller for a three-phase induction motor controlled by the technique of rotor flux orientation. The proposed approach combines sliding mode control with the fuzzy logic control to accurately track predefined trajectories, ensuring robust performance despite parameter variations and load disturbances. The combination of the two approaches reduces the high-frequency oscillations caused by the chattering phenomenon, without affecting the accuracy and robustness of the control. The design of the hybrid control law is described and numerical simulation results are presented and compared with the performance of conventional sliding mode control. These results clearly show the reduction of the chattering and the effectiveness of the proposed method in different operating conditions.

Keywords: Induction motor (IM), Non-linear control, Speed regulation, Fuzzy logic control (FLC), Sliding mode control (SMC), Fuzzy sliding mode control (FSMC), Chattering phenomena, Parameters variation, Robustness