纯电动汽车双电动机耦合驱动系统效率最优控制策略

李胜琴; 丁雪梅; 于博

doi:10.3969/j.issn.1671-7775.2022.01.001

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江苏大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (1) : 1-7. DOI: 10.3969/j.issn.1671-7775.2022.01.001

论文

纯电动汽车双电动机耦合驱动系统效率最优控制策略

作者信息 +

Optimal control strategy of efficiency for dual motor coupling drive system of pure electric vehicle

Author information +

文章历史 +

摘要

针对某型纯电动汽车，设计双电动机耦合驱动系统，并进行电动机参数匹配，提出了电动机耦合驱动效率最优控制策略.对驱动系统的工作模式进行分析，通过序列二次规划算法计算出电动机最优工作点以及驱动系统效率.基于驱动系统效率最优原则，通过比较每个工作点的4种工作模式下的驱动系统效率，提出多模式切换下双电动机耦合驱动系统的控制策略，重点对模式识别控制策略进行研究.建立联合仿真模型对所提出的效率最优控制策略进行试验验证.结果表明:提出的双电动机耦合驱动系统效率最优控制策略具有良好的控制效果，在整个NEDC（new European driving cycle）循环工况中，双电动机耦合驱动系统的平均效率为85.9%，驱动系统效率大于85.0%的电动机工作点占整个工作区间的55.0%，电动机可以工作在较高的效率区间内，电动机的负荷率更高，车辆动力性能和经济性能得到了提升.

Abstract

For a pure electric veicle, a dual motor coupling drive system was designed with motor parameter matched, and the optimal control strategy of motor coupling drive efficiency was proposed. The working mode of the drive system was analyzed, and the optimal working point of motor and the efficiency of drive system were calculated by the sequential quadratic programming algorithm. Based on the principle of optimal drive system efficiency, by comparing the drive system efficiencies under four working modes at each working point, the control strategy of dual motor coupling drive system under multi-mode switching was proposed with emphasis on the pattern recognition control strategy. A co-simulation model was established to verify the proposed efficiency optimal control strategy. The results show that the proposed optimal efficiency control strategy of the dual motor coupling drive system has good control effect. In the whole new European driving cycle（NEDC）, the average efficiency of the dual motor coupling drive system is 85.9%, and the motor operating point with the driving system efficiency greater than 85.0% accounts for 55.0% of the whole operating range. The motor can work in high efficiency range with more high load rate of motor, and the dynamic performance and economic performance of the vehicle can be improved.

导出引用

李胜琴, 丁雪梅, 于博. 纯电动汽车双电动机耦合驱动系统效率最优控制策略[J]. 江苏大学学报（自然科学版）, 2022, 43(1): 1-7 https://doi.org/10.3969/j.issn.1671-7775.2022.01.001

LI Shengqin, DING Xuemei, YU Bo. Optimal control strategy of efficiency for dual motor coupling drive system of pure electric vehicle[J]. Journal of Jiangsu University(Natural Science Edition), 2022, 43(1): 1-7 https://doi.org/10.3969/j.issn.1671-7775.2022.01.001

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