The invention discloses a driving torque distribution method and system for a front-rear-axle dual-motor driving electric vehicle and a computer readable storage medium, and belongs to the technical field of electric vehicle torque distribution. The driving torque distribution method for a front-rear-axle double-motor driving electric vehicle comprises the following steps: converting a rotating speed-torque-efficiency MAP of a motor into a rotating speed-load-efficiency MAP; acquiring a required torque and rotating speed, providing a group of distribution coefficients for a rear axle motor toform a distribution coefficient group, sequentially selecting each distribution coefficient in the distribution coefficient group, acquiring comprehensive efficiency corresponding to each distributioncoefficient according to each distribution coefficient, the rotating speed-load-efficiency MAP corresponding to each distribution coefficient and the rotating speed, and acquiring a distribution coefficient k corresponding to the maximum comprehensive efficiency; and determining driving torques of the front axle motor and the rear axle motor according to the distribution coefficient k, the motorexternal characteristic curve and the required torque. According to the method provided by the invention, the comprehensive efficiency of double-motor combined work is optimized.

    本发明公开一种前后轴双电机驱动电动汽车的驱动扭矩分配方法、系统及计算机可读存储介质,属于电动汽车扭矩分配技术领域。一种前后轴双电机驱动电动汽车的驱动扭矩分配方法,包括以下步骤:将电机的转速‑扭矩‑效率MAP图转换为转速‑负载‑效率MAP图;获取需求扭矩及转速,给后轴电机提供一组分配系数,形成分配系数组,依次选取分配系数组中各分配系数,根据各分配系数、各分配系数对应转速‑负载‑效率MAP图及转速,获取各分配系数对应的综合效率,得到最大综合效率对应的分配系数k;根据分配系数k、电机外特性曲线及需求扭矩,确定前轴电机及后轴电机的驱动扭矩。本发明所述方法,实现了使双电机联合工作的综合效率达到最优。


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    Title :

    Driving torque distribution method and system of front-rear-axle dual-motor driving electric vehicle


    Additional title:

    前后轴双电机驱动电动汽车的驱动扭矩分配方法及系统


    Contributors:
    TIAN SHAOPENG (author) / YANG YU (author)

    Publication date :

    2020-12-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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