The invention discloses a motor torque control method which is applied to an electric vehicle, and the electric vehicle is a double-motor four-wheel-drive electric vehicle. The method comprises the steps that front and rear motors are controlled to apply torque to front and rear shafts to make wheels rotate; front axle differential protection limiting torque is determined according to the rotating speed difference of left and right front wheels; determining a rear axle differential protection limiting torque according to the rotating speed difference of the left and right rear wheels; judging whether the front axle and the rear axle slip or not according to the front axle differential protection limiting torque and the rear axle differential protection limiting torque; when one of the front axle and the rear axle slips and the other one does not slips, the differential protection limiting torque corresponding to the slipped axle is subtracted from the request torque applied to the slipped axle; adding differential protection limiting torque corresponding to the shaft which slips into the request torque applied to the shaft which does not slips; and the left front wheel, the right front wheel, the left rear wheel and the right rear wheel are driven to rotate through the adjusted request torque.

    本发明公开了一种电机扭矩控制方法,应用于电动汽车,所述电动汽车为双电机四驱电动汽车。所述方法包括:控制前后电机分别对前后轴施加扭矩使车轮转动;根据左右前轮的转速差确定前轴差速器保护限制扭矩;根据左右后轮的转速差确定后轴差速器保护限制扭矩;根据前轴差速器保护限制扭矩和后轴差速器保护限制扭矩判断前轴和后轴是否出现打滑;当前轴和后轴中的一者出现打滑而另一者未出现打滑时,从与出现打滑的轴上施加的请求扭矩中减去与出现打滑的轴对应的差速器保护限制扭矩,并在与未出现打滑的轴上施加的请求扭矩中加上与出现打滑的轴对应的差速器保护限制扭矩;通过调整后的请求扭矩带动所述左前轮、右前轮、左后轮及右后轮旋转。


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    Title :

    Motor torque control method, system and device and automobile


    Additional title:

    一种电机扭矩控制方法、系统、装置以及汽车


    Contributors:
    LEI YUNLU (author) / DAI XIANG (author)

    Publication date :

    2025-01-07


    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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