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Robust FOC Analysis of a DFIM using an SMFO: Application to Electric Vehicles

This paper presents a Stator Field Oriented Control (SFOC) of an electric vehicle propulsion system based on a Doubly-Fed Induction Machine (DFIM) drives using a Sliding Mode Flux Observer (SMFO). The SFOC strategy is penalized by its high sensitivity against parametric variations and particularly the stator resistance. This variation yields noticeable flux distortion, which affects considerably the system’s performance. Thus, SMFO is added to the control strategy of DFIM to ensure a robust control versus parameter variations. In such a way, sensors for speed and stator flux might be dismissed, to avoid cost increase and system reliability degradation. Simulation results on MATLAB/Simulink show that the proposed observer provides high-performance dynamic characteristics which shows the robustness of the proposed scheme against plant parameter variations.