Research On Light Electric Passenger Car Power System Modeling And Simulation And Testing

Currently, automobile has promoted the improvement of the society as an indispensible mean of transport. However, at the same time, it also caused serious pollution and crisis of petroleum. Because electric vehicle has unparalleled advantage in energy-saving and environmental protection compared with traditional engine vehicle and it can lighten people's rely on petroleum resources and relieve the problem of the environment, the research and development of electric vehicles has become the hot spot among the governments and auto industry. Electric vehicle will certainly become an important green transport in twenty-one century.The paper relies on the light electric passenger car, through the study of simulation, the performance and the design discipline can be better understood, the rationality of the matching of can be proved. Thus the cycle of design can be shorten and cost of design can be reduced and the performance of the car can be enhanced. The study of the test on the car can build a test platform for electric vehicles, especially for light electric passenger car.First, the paper discusses the development history, the development state, the basic structure and characteristic, advantage and disadvantage of pure electric vehicles, thus analyzes the necessity of the development of pure electric vehicles. Through the analysis of the state of light electric passenger car power system modeling and simulation and testing, the paper raises the method of modeling and simulation and testing for light electric passenger car power system.Second, under the environment of MATLAB/Simulink, regard ADVISOR as the simulation platform, the vehicle model, the wheel/axle model, the final drive model, the transmission model, the motor/controller model and the energy storage model are constructed. As to the limitation of the software which can only simulate the front drive vehicles, ADVISOR is redeveloped, and the models of the rear drive and each part of the power system are establish in this paper. The models are feasible by simulation analysis and the matching are checked to be rational.Finally, through the testing on the road and on the chassis dynamometer on the sample car, the rationality of the matching is further demonstrated. By the detailed introduction of the road test and testing on chassis dynamometer, the principle of the simulation of chassis dynamometer and the treatment processes of coastdown test are stated and the method of resistance setting are compared, the testing system of light electric passenger car are established and it provides reference to the study on light electric passenger car.