Article
PERFORMANCE EVALUATION OF TORQUE CONTROL STRATEGIES IN ELECTRIC VEHICLE IPMSM DRIVES
Interior Permanent Magnet Synchronous Motors (IPMSMs) are widely adopted in electric vehicle (EV) propulsion systems due to their high efficiency and torque density. However, torque ripple remains a significant challenge, particularly under dynamic load conditions affecting drivability, efficiency and component lifespan. This study presents a comparative analysis of two prominent control strategies—Field-Oriented Control (FOC) and Direct Torque Control (DTC)— in terms of their effectiveness in reducing torque ripple in IPMSM drives. A simulation framework was developed using Python to model the motor behaviour under identical speed and load conditions. The results indicate that FOC produces smoother torque output with minimal ripple, owing to its decoupled control of flux and torque through dq-axis currents. In contrast DTC despite offering faster dynamic response introduces higher torque ripple due to its hysteresis-based voltage vector switching. Quantitative comparisons based on torque ripple amplitude, current quality and speed regulation confirm the superiority of FOC for applications where smooth and efficient torque delivery is critical. This research reinforces FOC as the preferred control strategy for IPMSM-driven EVs, especially in scenarios demanding high precision and minimal mechanical stress
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