Comparison of Direct Torque Control Method and Field Oriented Control Method for Induction Motor In Electric Vehicle
Gökhan Bahadır Onur Karaoğlu Mustafa Aktaş
AbstractThe problem of batteries in electric vehicles is one of the biggest problems. Late charging and premature discharge of the battery makes it difficult to travel to distant ranges on electric vehicles. For this reason, it is necessary to regularly use the energy that is charged in the battery. At the same time, the torque to be produced in the electric vehicle must be sufficiently low to oscillate and the torque must not sinusoidally move. The fluctuation in torque also affects motor speed. Thus, it is necessary to improve the speed control performance by reducing the fluctuation of the torque the least. Direct Torque Control (DTC) and field oriented control (FOC) methods become an industrial standart for induction motor driving. The aim of this paper is to compare the performance of field oriented and direct torque control of 3-phase induction motor. Speed, torque, stator currents, stator flux linkages, flux plane characteristic of induction motor which is controlled by DTC and FOC methods, are obtained from simulation applying reference speed to induction motor. Furthermore, output energy and power by induction motor, are calculated and plotted. The analysis of this chracteristics are simulated by Matlab. İn this study, energy efficiency is achieved by consuming less power through the proposed method.