Research On Braking Energy Recovery System Of Brushless DC Motor Based On Super-Capacitor

In recent years,with the increasing scale of industrialization in the world,the problems of environmental pollution and energy shortage have become the focus of the whole society.In order to effectively deal with the above situation,many countries are making efforts to promote the development of new energy vehicles.Compared with the traditional car,electric vehicles have the advantages of zero emission,low noise and environmental protection,which not only ease the environmental pollution,but also reduce the dependence of human society on the natural energy such as oil by the power-driven features.The main use of electric vehicles in the city or suburban driving,the more frequent start-up and braking is a notable feature of this type of driving conditions,so how to improve the efficiency and life of the energy storage system in this type of driving conditions is very crucial.Electric vehicle braking energy recovery technology can effectively improve the utilization of on-board energy sources,the technology in the field of new energy vehicles has received great attention.Based on the above background,this paper presents a hybrid energy storage system with super-capacitor and battery in the field of braking energy recovery for electric vehicles.The dynamic performance characteristics of the super-capacitor,a new type of energy storage device under complex conditions,fully consider the energy storage system efficiency and life under the premise of the energy recovery of the entire process of analysis.The main work of this paper includes the following aspects:1.Analysis of the structure and working principle of brushless DC motor,and given the performance parameters of the motor used in the experiment,in order to simulate the electric vehicle drive motor,under the premise of the follow-up simulation and experiment.2.Focusing on the analysis of the dynamic performance characteristics of the Super-capacitor under multi-working conditions,the multi-mode simulation experiment is carried out and the dynamic characteristics of the super-capacitor are simulated by using the simulation.3.Research on electric vehicle energy recovery control system and analysis of its principle,at the same time in MATLAB/simulink to build the system simulation model,simulation verification and analysis.4.Based on the STM32F4 series of controllers to build experimental platform,a detailed description of the main platform of the host controller,hardware and control processes.Complete control system software preparation,commissioning of various parameters,to complete the experiment and analyze the experimental results.5.Summarize and analyze the full text,point out the shortcomings of this article and put forward suggestions for improvement,and at the same time,make a preview of the research direction of this article.