Förnybar energikälla, modellering och simulering av elektrifierat framdrivningssystem

Abstract

This report is focused on the methodology of modelling an electric propulsion system of a heavy vehicle intended for military use, foremost used to ship large and heavy cargo in different types of terrain. The purpose of modelling the propulsion system is to be able to simulate the vehicle in relevant settings and environments for the intended area of use. The work in this report is theoretical and no physical constructions were made. The modelling and simulation is made with software, more specific Matlab and Simulink. An extra energy source is included in the system to simulate the differences between a possible maintenance charge of the battery during operation and it’s effect on the range of the vehicle. The simulation results will show the performance of the vehicle that has been modeled. The overall result of the report will show wheter a such system has the potential to replace the existing vehicles in the military fleet driven by fossil fuels, and possible areas of development. No comparision is made with the existing vehicles, but the performance of the modeled electric propulsion system is analyzed. The conclusion is that the modeled system has a performance similar to the reference literature. The grade force and the rolling resistance is what affect the power consumption mostly, while the aerodynamic force is less significant. The vehicle handles the settings and environments that the system is simulated in. Furthermore is the extra energy source necessary to achieve longer range. For the external factors, the development within battery technology and fuelcell technology gives a positive future on the subject.