负载隔离式电动汽车再生制动控制策略研究

Regenerative Braking Control Strategy for Load Isolated Electric Vehicle

针对负载隔离式电动汽车能量利用率低的问题,本文主要对负载隔离式电动汽车再生制动控制策略进行研究。通过对负载隔离式电动汽车制动动力学和ECE法规进行分析,得出满足条件的制动力分配系数及制动力分配的上下限,据此提出基于制动强度划分的再生制动控制策略。在Matlab/Simulink搭建再生制动控制模型,并将模型嵌入到Advisor中进行仿真分析。仿真结果表明,与原控制策略相比,在CYC_NEDC工况下行驶时,汽车制动时电机输出功率提高,电机损失功率减少,电机输出的瞬时电流增大,说明该再生制动控制策略明显提高了电动汽车制动能量的回收效率。该控制策略为负载隔离式电动汽车进一步提高能量利用率提供了理论基础。

Aimed at the problem of load isolation pure electric vehicle energy availability low,this paper mainly studies of the Regenerative braking. The vehicle braking dynamics and the ECE braking regulation were ana-lyzed and the paper proposed a regenerative braking control strategy based on brake-strength braking system. It got upper and lower limits that meet the braking force distribution coefficient of ECE regulations, as well as brake-force distribution. And it proposed a regenerative braking control strategy based on brake-strength bra-king system. The paper used the Matlab/Simulink to build the regenerative braking control model,and implant the model to software Advisor, finished the simulation analysis. The simulation results prove that when driving car in CYC_NEDC conditions, compared with the primary control strategy, when braking the motor output power is improved, motor power loss is reduced, and output current is increased. The regenerative braking control strategy can improve the braking energy recovery efficiency. The control strategy for vehicle to further improve energy efficiency for load isolation provides a theoretical basis.