The invention discloses a torque distribution method for a four-wheel hub motor-driven vehicle considering motor efficiency differences, and relates to the technical field of new energy automobiles, comprising the following steps: obtaining the maximum driving force of the vehicle according to the speed of the four-wheel hub motor-driven vehicle; according to the maximum driving force of the vehicle and the pedal opening degree, the total required torque of the vehicle is obtained; based on the total demand torque of the vehicle, a driving efficiency objective function and constraint conditions are established; performing torque distribution optimization solution according to the driving efficiency objective function and the constraint condition to obtain an optimal distribution coefficient; and according to torque slope limitation, the optimal distribution coefficient is corrected, a torque distribution result of the four-wheel hub motor driven vehicle is obtained, and torque distribution of the four-wheel hub motor driven vehicle considering the motor efficiency difference is completed. The problem that the motors work in a low-efficiency area due to the fact that the efficiency map between the motors is ignored in a traditional torque distribution method is solved.

    本发明公开了一种考虑电机效率差异的四轮轮毂电机驱动车辆扭矩分配方法,涉及新能源汽车技术领域,包括以下步骤:根据四轮轮毂电机驱动车辆的车速,获得车辆最大驱动力;根据车辆最大驱动力和踏板开度,获得车辆总需求扭矩;基于车辆总需求扭矩,建立驱动效率目标函数和约束条件;根据驱动效率目标函数和约束条件,进行扭矩分配优化求解,获得最佳分配系数;根据扭矩斜率限制,对最佳分配系数进行修正,获得四轮轮毂电机驱动车辆扭矩分配结果,完成考虑电机效率差异的四轮轮毂电机驱动车辆扭矩分配。本发明解决了传统扭矩分配方法由于忽略电机之间的效率map,导致电机工作在低效率区域的问题。


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    Title :

    Torque distribution method of four-wheel hub motor-driven vehicle considering motor efficiency difference


    Additional title:

    考虑电机效率差异的四轮轮毂电机驱动车辆扭矩分配方法


    Contributors:
    JIN HAO (author) / LAI SHENG (author) / HUANG BO (author) / LI XUAN (author)

    Publication date :

    2024-03-01


    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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