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<p>This paper investigates the performance of doubly fed induction machines (DFIMs) in electric vehicle (EV) traction applications under a nonlinear sliding mode control (SMC) strategy, powered by dual PWM voltage-source inverters. A torque maximization algorithm, formulated as an energy-constrained SMC, is developed to optimize the machine’s performance across the entire operating range. Considering the limitations of power electronic devices in terms of voltage and current, the stator and rotor current references are determined to ensure maximum torque production. The corresponding flux references are derived using a graphical calculation method (GCM) to achieve optimal torque for any operating condition and speed. Simulation results in MATLAB/Simulink under realistic driving cycles demonstrate that the proposed control strategy maintains high-torque performance over a wide speed range, allowing operation up to twice the nominal speed before entering the field-weakening region. These results confirm the effectiveness and robustness of the GCM-based SMC approach for high-performance EV traction systems.</p>

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Robust Nonlinear Field-Weakening Control Based on Graphical Calculation Method for High-Speed DFIM Drives in EV Applications

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • Mouna Zerzeri,
  • Adel Khedher

摘要

This paper investigates the performance of doubly fed induction machines (DFIMs) in electric vehicle (EV) traction applications under a nonlinear sliding mode control (SMC) strategy, powered by dual PWM voltage-source inverters. A torque maximization algorithm, formulated as an energy-constrained SMC, is developed to optimize the machine’s performance across the entire operating range. Considering the limitations of power electronic devices in terms of voltage and current, the stator and rotor current references are determined to ensure maximum torque production. The corresponding flux references are derived using a graphical calculation method (GCM) to achieve optimal torque for any operating condition and speed. Simulation results in MATLAB/Simulink under realistic driving cycles demonstrate that the proposed control strategy maintains high-torque performance over a wide speed range, allowing operation up to twice the nominal speed before entering the field-weakening region. These results confirm the effectiveness and robustness of the GCM-based SMC approach for high-performance EV traction systems.