Abstract :
Electric vehicle as a new means of transport, with its clean energy source pollution, diversification and energy driven higher efficiency become the development trend of the auto industry. But electric vehicles on a single charge range is significantly less than the motor car, the lack of a serious impact on the development and popularization of electric vehicle, included in the design of electric vehicle´s energy recovery system is the effective way to solve this problem. The definition of the automobile´s braking system is that the electric vehicle converts parts of kinetic energies of vehicle as electric power while decelerating, the electric power of converting is stored in the saving device, in order to increase the mileage of electric vehicles. When driving in braking the inertia of the vehicle wheels through the transmission of energy to pass through to the motor, to control electrical engineering with the generating electricity a way work refreshes for power battery and achieve the regeneration of braking energy. Meanwhile, the power produced during the motor braking torque can be exerted through the transmission of the driving wheel brake, resulting in braking force.
