Simulation and control of the velocity and electromagnetic torque of a three-phase induction motor: An electric vehicles approach

Abstract

In this study we present the results obtained in simulation and control of a three-phase induction motor using MATLAB / Simulink. The analysis includes the study of the transient response of the MTI in open loop and in closed loop using two types of controllers: Direct Torque Control (DTC) and Scalar Control. The most relevant results of this work are obtained when the performance of each controller, whose main objective is to follow the desired speed profile, is assessed, attending to the dynamic responses of the rotor’s mechanical velocity, electromagnetic torque, rotor’s and stator’s magnetic flux and currents, as well as the excitation voltages. Two operation scenarios are considered: in the first case the MTI operates without mechanical load and in the second one it operates as a propulsion system of a vehicle with mechanical parameters close to those of a conventional car. Likewise, it was demonstrated that the DTC provides the system with a more optimal dynamic behavior, minimizing the speed and electromagnetic torque tracking errors, minimizing the ripple in the torque and estimated flow values.