Direct Torque Control of an Induction Motor Using Fractional-Order Sliding Mode Control Technique for Quick Response and Reduced Torque Ripple

Abstract

The performance of electric drive propulsion systems is often degraded by the high torque and flux ripples of an electric drive. Traditional control methods, such as proportional plus integral (PI) controllers and classical sliding mode controllers (SMCs), have shown good response and reduced torque ripple, but even lower ripple content at low voltage levels is required for its effective use in electric vehicle (EV) applications. In this paper, a new direct torque control (DTC) technique with space vector pulse width modulation (SVPWM) using fractional-order sliding mode control (FOSMC) for a two-level inverter (2LI) at constant switching frequency is proposed. The effectiveness of this proposed controller is compared with a conventional proportional-integral controller and a conventional sliding mode controller (SMC). Simulink models are developed using MATLAB version R2018a to analyze the robustness of the proposed control strategy. Simulation results demonstrate the advantage of the proposed controller in reducing the torque ripples at steady state with less settling time during sudden load change conditions. The proposed control technique also demonstrates better utilization of the stator flux through flux trajectory waveforms.

Research on Path Tracking and Yaw Stability Coordination Control Strategy for Four-Wheel Independent Drive Electric Trucks

“…Considering that there is a certain coupling relationship between tire lateral force and driving force, it is difficult to control the lateral force and it is relatively smaller compared to the driving force. Therefore, the influence of lateral force is not considered here, and the objective function is simplified to the form of Equation (40).…”

“…Therefore, they are widely used by researchers in different fields. Gudey et al [40] proposes a fractional order sliding control (FOSMC) technique to reduce torque and flux ripple operating at fixed switching frequencies. Alebi et al [41] designed a new fractional sliding mode controller for precise speed control of permanent magnet synchronous motors to track desired commands more quickly.…”

Fuzzy Logic Based DTC Control of Synchronous Reluctance Motor

“…The conventional DTC employs PID controller in the speed control loop [17], the disadvantages of PID controller are the complexity of tuning especially for complex systems, sensitivity to Model Changes, struggle to adapt to changing operating conditions and parameters variations, integral action can experience integrator windup during significant changes in set point [18].…”

Performance Prediction of a 4WD High-Performance Electric Vehicle Using a Model-Based Torque-Vectoring Approach

“…These systems enhance stability, cornering performance, and traction on different road surfaces. In references there are several different types of torque-vectoring control systems for electric vehicles [16,17].…”