Proposal of an Optimal Control of an Electric Vehicle by Combined FOC and DTC Techniques

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Abstract This work is the continuation of a research project launched 4 years ago, concerning the optimization of the propulsion of an electric vehicle, which is divided into two major axes: one deals with the signal processing part used for dynamics and the other deals with control techniques for vehicle driving. In this paper, we present our idea for the optimization of propulsion. We propose to use a combined control of field-oriented control (FOC) and direct torque control (DTC). The two well-known techniques have different advantages depending on whether you are looking at speed or torque. The vehicle is driven by a permanent magnet synchronous motor (PMSM). Throughout the journey, we apply a FOC to control the speed where the road is flat, and we apply a DTC whenever we need the desired torque. Switching between the two control techniques is ensured by a well-adjusted switch via the variation of the load torque obtained by the vehicle dynamics sensors. The results obtained show good stability of the proposed system and allow the intended operation of the propulsion system. Cite this article as: S. Taa and B. Mokhtari, "Proposal of an optimal control of an electric vehicle by combined FOC and DTC techniques," Electrica, 24(3), 660-669, 2024.

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