Based On ARM Electric Vehicle Braking Energy Feedback System

Modern automobile industry must solve three problems of safety, energy saving and environmental protection in the development process. Cars working in the city always meet traffic jam and traffic lights, frequently braking can cause enormous amounts of energy consumption. Provided that we can recycle those energy and reuse it in start and acceleration stage of cars, on the one hand, the dynamic property of cars can be modified and the fuel consumption is reduced. Also, exhaust emission is reduced which is good for environmental protection. Furthermore, braking energy recovery as a specific technique to raise energy utilization of electric cars, it can significantly increase the life of braking system parts.Super capacitor-battery hybrid energy storage system, parallelly connected by super capacitor and battery, can sufficiently utilize the advantages of super capacitor to improve the dynamic property of electric cars. It can not only improve the service life of battery, but also increase the electric car’s range.This thesis bases on a special electric car, through the research on driving situations of china’s urban cars, the recovery of regenerative braking energy of electric car by using super capacitor as storage elements was presented. Physical simulation model of super capacitor recycle system was established. And the LPC2400 series ARM aiming at NXP company was designed. By applying pulse width modulation technology, the super capacitor recovery braking control system of electric car was achieved, and the parameters of key parts of the driving control system were confirmed, the factors that may influence energy recovery efficiency were analyzed. Besides, through analyzing and researching the dynamic simulation for the whole system, key factors that may influence the system recycle efficiency were obtained. By setting up experiment platform, the feasibility of recycling braking energy and rationality of storage capacity design were proved.The testing results show that under the fuzzy PID control, the response effects of regenerative braking controller is fine, and it has noticeable energy saving effects. Besides, control algorithm and storage system of the bidirectional DC/DC convertor are the two main factors that may influence braking energy recovery. In the whole operation process, there is no exhaust emission, so it has great significance for environmental protection.