Rear-wheel drive electric vehicle regenerative braking control strategy

With the government and society on the environment and energy issues to improve the degree of attention, energy saving automobile industry has become one of the main objectives. The development of electric vehicle technology into an important phase in which regenerative braking energy and environmental technologies as one of the key technologies, there are many problems to be solved Cheng. Car in a lot of kinetic energy during braking by friction into heat dissipated, leading to premature wear of automotive brake systems, increasing the cost of car use. Use of regenerative braking for energy recovery is a major energy-saving electric car advantage. Regenerative braking system, the energy dissipation of the original friction brake, part of the recycling and reuse, can effectively improve the energy efficiency of vehicles, play a role in energy conservation. After this drive electric vehicles as the research object, the main job of the following work: Through the regenerative braking energy storage system and the analysis of constraints, select a super capacitor energy storage system for the regenerative braking device. In the analysis of electric vehicle regenerative braking system architecture design based on the proposed super-capacitors and lithium batteries independent regenerative braking System Scheme. From the theoretical analysis of the brushless DC motor used in the regenerative braking system, the feasibility of, and establish the simulation model using SIMULINK; built a brushless DC motor regenerative brake tester, verify the correctness of the model by experiment.Analysis of rear-wheel drive electric vehicle hydraulic braking characteristics, and work out the brake pedal stroke speed and the regenerative braking control signal control strategy, and after the establishment of the use of SIMULINK regenerative braking electric vehicle drive system simulation model, according to GB21670-2008 "passenger car braking system technical requirements and test methods "to the O-test simulation. Simulation results show that to meet the braking performance, while more than 10% can recover braking energy to verify the feasibility of the control strategy. Key words: rear-wheel drive electric vehicle, regenerative braking, test stand, control strategy