Design And Experiment Vaditation Of DC-DC Model For Synergic Electric Power Supply System On Vehicle

In the last 20 years, the automotive industry has seen rapid development, but then the energy shortage and environmental pollution is becoming increasingly serious, governments around the world have been paying close attention. To address this problem, many governments, automobile enterprises and scientific research institutions have also developed the vehicle as the focus of low-power, low emissions of new cars, and at the same time improve the regulations on car exhaust emissions requirements. The Hybrid Electric Vehicle(HEV) can combine the goodness of conventional internal-combustion engine vehicle and electric vehicle, not only to meet the previous general vehicle performance requirements, but also to achieve the purpose of low-power and low-pollution, HEV have much market potential and receive much recognition.In recent years, as hybrid vehicles of the rapid development of its automotive power technology have been greatly improved, and on-board power requirements are also increasing, with the power of hybrid vehicles in the application of cars in the DC-DC power requirements are also referred to a new height, in the past various automotive DC-DC power supply on the various uniformity requirements, such as high efficiency, power, dynamic response speed, a variety of working conditions, high precision, in the composite power required by the DC-DC integrated, we must reflect, which calls for such a DC-DC combination of the past, almost all the advantages of DC-DC, this is a very challenging research content at the same time Such consistent DC-DC design simulation and control model is very meaningful work.Along with the continuous deepening of research, how to choose DC-DC model, the development of practical DC-DC simulation platform has become the key issues to be resolved. Therefore, the analysis of the structure of DC-DC, DC-DC design of the simulation model, strategies to control a package of the simulation module, accurate verification of the model, this is the main contents. Details are as follows:1. Paper first on hybrid vehicles and the development of composite power status and technological superiority, and then composite and hybrid vehicles on the DC-DC power requirements, as compared with the structure of the various advantages and disadvantages of DC-DC and applicable conditions, select the most Composite Power for the use of DC-DC structure.2. Accordance with the choice of DC-DC, static and transient analysis of its work, such as closing his movements pressure principle, in accordance with the principles of the design of the DC-DC simulation model. And in accordance with the actual need for their control strategies, and supporting a series of design simulation modules with different current, charge and discharge simulation, test simulation model of efficiency.3. Modeling of the DC-DC Based on the analysis of DC-DC test the actual efficiency, the use of data tests, as compared with simulation data, in order to test the accuracy of simulation model, the simulation model to be evaluated.Based on hybrid vehicles and composite power demand in the work of Simulink / Simpower platform for the establishment of a DC-DC simulation model, simulation and test data in the course of the voltage curve comparative studies, the establishment of a verification model of DC-DC credibility applied as a control system dSPACE in the Decathlon-test simulation platform on the test, and in the same condition Simpower Simulation results were compared to DC-DC model of the accuracy of assessments. The simulation results and experimental results of the comparison show that the model built DC-DC high accuracy, for the development of practical power system simulation platform provide a favourable basis.