Modeling And Simulation Of Electric Vehicle
algebraic Loop Problems Regarding Battery and Fuel Cells
Open Access
Author:
Mao, Zifang
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
May 27, 2014
Committee Members:
Jeffrey Scott Mayer, Thesis Advisor/Co-Advisor
Keywords:
Electric vehicle battery PEM fuel cell linearization algebraic loops MATLAB/Simulink
Abstract:
Vehicles equipped with internal combustion engine (ICE) have been in existence for over a hundred years. Although ICE vehicles (ICEVs) are being improved by modern automotive electronics technology, they need a major change to significantly improve the fuel economy and reduce the emissions. Electric vehicles (EVs) and hybrid EVs (HEVs) have been identified to be the most viable solutions to fundamentally solve the problems associated with ICEVs.
This thesis is concerned with modeling and simulation of EVs. Specifically, additional attention is paid to algebraic loops, a general problem that may occur in many other systems besides vehicles. First, a nonlinear battery model is developed and the algebraic loop is broken by several different methods. The simulation results are compared and analyzed. Then a PEM fuel cell model is developed and the results from the literature are reproduced. The fuel cell model contains a more complex algebraic problem when connected to a load other than current source. This problem has not been talked about in the literature and some different methods are developed and compared to deal with it. Last, an electric vehicle model is developed and previous methods are applied to the vehicle model. The simulation results of the EV model are analyzed and discussed as well.