单双电机机械变速器直连系统性能对比研究

A Comparative Study on Performance Between Single-motor and Dual-motor Electric-Drive Mechanical Transmission

双电机无同步器多挡机械变速器系统可以有效改善重型商用车经济性和动力性。为分析系统在最优参数下的最优性能,并综合考虑车质量和空满载差异的影响,本研究同时优化驱动电机参数和机械变速器速比参数,对比最优参数下单/双电机多挡驱动系统的经济性和动力性。结果表明:双电机驱动系统降低了车辆经济性对车质量以及空满载差异的敏感度;双电机驱动系统最高车速提高约8%,加速时间可节省约28%。

A dual-motor non-synchronizer multi-gear mechanical transmission system can effectively im⁃prove the energy economy and power performance of heavy-duty commercial vehicles.In order to analyze the optimal performance of the system under the optimal parameters,and to consider the effect of vehicle weight and differences between no load and full load,this study optimizes both the drive motor parameters and mechanical transmission speed ratio parameters,and compares the energy economy and power performance of the single/dual-motor multigear mechanical transmission system under the optimal parameters.The results show that the dual-motor drive sys⁃tem reduces the sensitivity of the vehicle energy economy to the difference in vehicle weight and no/full load,with the maximum speed of the dual-motor drive system increased by about 8%,and the acceleration time saved by about 28%.