Abstract
Electric Motors (EMs) and their control methods play an essential role in the development of energy-efficient drivetrains, particularly electric vehicle (EV) powertrains. It should be pointed out that the electric motors and their control methods are one of the key aspects in all EV propulsion systems. Thus, in this article, different motor control methods (i.e. Indirect Field-Oriented Control (IFOC), Hybrid IFOC and PWM voltage scheme, IFOC based on SVPWM, Direct Torque Control (DTC), and DTC based on SVPWM) are designed and investigated in detail by using Matlab/Simulink. This article also presents the dynamic modeling of electric motor taking into account its core losses. Based on the developed loss model, the IFOC based on PWM voltage and PSO is proposed to enhance the motor efficiency especially at low load conditions. A comparative study of these motor control methods is provided in this paper in order to select the proper motor control strategy. The obtained results have demonstrated that the proposed PSO algorithm significantly minimizes the motor losses at any operating condition by selecting the optimal flux level. The simulation and experimental results are provided and discussed.
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