الفهرس | Only 14 pages are availabe for public view |
Abstract This thesis is concerned with validation of static and dynamic behavior of electric vehicle drivetrain system (EVDS) with wide-speed range torque control. In addition to propose a generalize methodology for wide parametric design and integration of the EVDS for electric vehicles (EVs). Firstly, for prescribed specifications of the EV, a wide parametric design procedure is provided for determining the ratings of EVDS components. The ratings include motor power, torque, speed, and battery capacity; which consider the maximum velocity and maximum acceleration rate of the vehicle to achieve the heaviest road conditions. The proposed methodology is then applied to one reference vehicle (Nissan-leaf 2015 E-car) and a proposed fourpassenger city EV as a practical case studies with detailed calculations. Then, the static characterization of the designed EVDS is simulated and assessed with two practical driving cycles i.e. Urban Dynamometer Driving Schedule (UDDS) and highway driving cycle (Artemis MW_130). Secondly, field-oriented control (FOC) and model predictive control (MPC) techniques are developed for torque control of the TM to achieve the commanded tractive force according to the vehicle specifications and the driver requests. Driving the EV below and above the designed base velocity is conducted with rotor flux control and field weakening control of the TM, respectively. In the simulated of the EVDS, the dynamic modeling of the power plants i.e. vehicle, Li-ion battery, TM and road forces, are considered. The dynamic behavior of the EVDS of the proposed four-passenger city EV is analyzed and assessed with the same UDDS driving cycle. The acceptable coincidence between the dynamic performance and the static characteristics ensures the validity of the proposed methodology. Finally, a laboratory setup of the EVDS is built from the basic elements and the conducted control method within the integrated EVDS has been validated by experimental results. The performance of the EVDS is experimentally validated by different types of velocity profiles. The implementation guarantees working at light and heavy loads, multi start-stop running with different acceleration rates, running at maximum velocity, speed reversal, and moreover, smooth transition between different operational modes without any oversizing. |