Değişken yol şartlarında elektrikli araçların anlık moment ihtiyacının Lyapunov tipi bir gözlemleyici ile tespiti ve kontrolü

Asynchronous motors are used in electric vehicles and various control methods are available to control these motors used in electric vehicles. These are Scalar Control (V / f Control), Vector Control (Indirect Torque Control, ITK) and Direct Torque Control (DTC). Direct torque control is one of the preferred methods for the control of asynchronous motors used in electric vehicles. Direct torque control is simple and fast, which prevents other methods. At the same time, the Direct Torque Control method has a strong structure, the flux and torque can be controlled separately. In asynchronous motors used in electric vehicles, the load moment values vary depending on whether the road is flat or inclined, causing instability in motor control and causing fluctuations in current. By adding space vector modulation (SVM) to the direct torque control structure, fluctuations in current can be minimized. In electric vehicles, changes in switching times can be observed due to situations such as the road being flat or inclined, leading to instability in the motor control. As a result of the thesis study, the percentage of the flux circle similar to the full circle has increased from 92% to 96%. An improvement of 23% in total harmonic distortion in current, 2.5% in total harmonic distortion in flux and approximately 4% in total harmonic distortion in torque was recorded. A Lyapunov-based Flux Observer and a Lyapunov-based Timer were added to the Direct Torque Control structure where Space Vector Modulation was applied. The dynamic analysis of the electric vehicle, the mathematical modeling of the vehicle and the engine, the mathematical equations of the Lyapunov Flux Observer and the timer and the calculations required for its application to the system were made. The accuracy of the results of the system has been proven by using MATLAB / Simulink.