Simulation On The Compound Braking System For An EV Based On AMESim

Because the motor regenerative braking system can recylle the brake energy and increasethe mileage of an electric vehicle, it has become a major breakthrough at the technical field ofan electric vehicle. The original vehicle brake performance must be affected after theregenerative brake system is composed to conventional hydraulic brake system. Therefore, thehydraulic brake force and regenerative brake force need to be coordinate controlled toensuring the vehicle brake performance, while maximizing the energy recovery efficiency.So, according to the pure electric vehicle, this paper designed a set of compound brakesystem which can recylle brake energy under the premise of ensuring the safety, stable andsmooth of electric vehicle brake process. To this end, this paper put forward three sets ofregenerative brake force allocation strategy. This paper established a model of electric vehiclecompound brake system on the AMESim simulation platform. In view of the seriesregenerative brake force distribution strategy and the parallel regenerative brake forcedistribution strategy is proposed, simulation analysis on the different brake strength, differentinitial speeds and different road conditions.The results showed that the model can simulate the brake process of the vehicle and thetwo strategyes can well ensure braking performance while achieving energy recovery. Theenergy recovery rate gradually decreases with the increase of the brake strength. Theminimum energy recovery rate of series regenerative brake distribution strategy is19%andthe parallel regenerative brake distribution strategy is close to2%. When the brake strength isgreater than0.5, the energy recovery rate of series regenerative braking allocation strategybegan higher than the parallel regenerative braking allocation strategy. Factors of electricvehicles energy recovery efficiency are brake strength, road adhesion coefficient and theinitial velocity of the vehicle body, wich the greatest impact is the brake strength, followed byroad adhesion coefficient, and the smallest is the initial velocity of the vehicle.