Comparative Study of Control Strategies for Induction Motor Drives in Electric Vehicles

This book provides a complete and structured exploration of induction motor control for modern electric vehicle (EV) applications. Designed for students, researchers, and engineers in electrical engineering, it offers a deep understanding of three major control strategies used in high-performance AC drives: Scalar Control (V/f), Vector Control (FOC), and Direct Torque Control (DTC). Beginning with the mathematical modeling of induction motors and their power electronic inverters, the book presents fundamental concepts such as reference frame transformation, electromagnetic torque production, and flux dynamics. Clear explanations, diagrams, and simulation results help the reader master each step—from basic equations to advanced real-time implementation. The second part of the book analyzes in detail the working principles of Scalar Control, including steady-state operation, limitations, and typical industrial applications. It then introduces Field-Oriented Control (FOC), explaining decoupling, flux orientation, PI regulators, space-vector modulation, and advantages for dynamic performance. The third part focuses on Direct Torque Control (DTC), describing flux and torque hysteresis regulators, voltage vector selection, lookup tables, switching sequences, and issues such as torque ripple. Enhanced DTC techniques are also discussed to improve performance. The final chapter presents a comparative evaluation of FOC and DTC in electric vehicle traction systems, considering: • Dynamic response • Torque ripple • Energy efficiency • Robustness • Implementation complexity • EV-specific constraints (acceleration, load variation, regenerative braking) Simulation studies (MATLAB/Simulink) demonstrate real performance under acceleration, load changes, and steady-state operation. This book serves as an excellent reference for: • Undergraduate and graduate students • Researchers working on motor drives and EV propulsion • Engineers designing traction inverters or high-performance control systems • Anyone wanting a clear and rigorous understanding of AC motor control methods By combining theoretical foundations, practical modeling, and comparative analysis, this book offers a complete and accessible guide to mastering induction motor drive control for electric vehicle applications.