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为提高电动汽车制动能量的回收,提出一种根据电机转矩特性分配电动汽车前、后轴制动力的控制策略。在提出的分配策略基础上建立了制动能量系统仿真模型,并分别在MATLAB/Simulink和AVL-Cruise环境下进行了仿真分析。研究结果表明,电机特性制动力分配策略,能够满足制动法规的要求;与传统按I曲线分配前、后轴制动力的控制策略相比,能更充分地利用电机制动力。仿真结果表明,在NEDC法规循环工况下,能量回收提高了55.6%,能量回收率提高5.3%。
In order to improve the recovery of braking energy of electric vehicle, a control strategy is proposed to distribute the braking force of front and rear axles of electric vehicle according to the characteristics of motor torque. Based on the proposed allocation strategy, a braking energy system simulation model is established and simulated in MATLAB / Simulink and AVL-Cruise respectively. The results show that the motor characteristics of the braking force distribution strategy can meet the requirements of the braking regulations. Compared with the traditional I-curve distribution of the front and rear axle braking force control strategy, the motor braking force can be more fully utilized. Simulation results show that energy recovery is increased by 55.6% and energy recovery rate is increased by 5.3% under the NEDC regulations.