Research And Realization Of Regenerative Brake System For Electric Vehicle

The development of automobiles faces energy crisis and environmental pollution problems. Electric automobile is a feasible direction, because it uses electricity instead of oil, and it has no exhaust emissions or pollution. In addition, electricity can be got from water, wind, coal and solar energy. A lot of research has been done on electric automobiles, but still there are problems such as shortage of distance and lack of storage capacity. Increasing energy reserves and utilization is an effective way to solve the problem.In this article, we try to increase the driving distance of an electric vehicle, in the way of energy recovery. The electric vehicle can use both electricity and solar energy.The electric vehicle is driven by four hub motors. So, the braking energy of all four wheels can be recovered. The braking strategy of the electric vehicle is built out of three aspects: the relation of frictional braking force and regenerative braking force, the relation of frictional braking force between front wheels and rear wheels, the relation of regenerative braking force between front wheels and rear wheels.The models of vehicle parts and braking strategy are built with Matlab, and import into ADVISOR to form an experiment simulation platform for the electric vehicle. Experiment simulations are done in 1015 cycle, emergency braking run and slowdown braking run, to research the effect of braking strategy. The evaluation is mainly from such aspects as braking force, motor, storage battery and effect of regenerative energy.The realization of regenerative-hydraulic braking is discussed in the passage. The discussion is mainly about realization of regenerative braking, hydraulic braking and the coordination between them.