The invention relates to the technical field of electric vehicles, and discloses an electric vehicle locked-rotor fault detection method, device and equipment, and a storage medium. The method comprises the steps of acquiring a current motor rotating speed and a current motor torque of a motor, and searching for a temperature model coefficient corresponding to the current motor torque; determininga locked-rotor rotating speed flag bit according to the current motor rotating speed, and determining a locked-rotor torque flag bit according to the current motor torque; calculating a heating timeconstant according to the locked-rotor torque flag bit, the locked-rotor rotating speed flag bit and the temperature model coefficient; and when the heating time constant is greater than a preset constant threshold, judging that the motor has a locked-rotor fault. Therefore, the locked-rotor rotating speed flag bit and the locked-rotor torque flag bit are determined according to the current motorrotating speed and the current motor torque, whether a locked-rotor fault exists or not is judged by calculating the heating time constant, and detection accuracy of the locked-rotor fault of the electric vehicle is improved.

    本发明涉及电动汽车技术领域,公开了一种电动汽车堵转故障检测方法、装置、设备及存储介质,所述方法包括:获取电机的当前电机转速和当前电机扭矩,并查找与所述当前电机扭矩对应的温度模型系数;根据所述当前电机转速确定堵转转速标志位,并根据所述当前电机扭矩确定堵转扭矩标志位;根据所述堵转扭矩标志位、所述堵转转速标志位和所述温度模型系数计算发热时间常数;在所述发热时间常数大于预设常数阈值时,判定所述电机存在堵转故障。从而根据当前电机转速和当前电机扭矩确定堵转转速标志位和堵转扭矩标志位,进而计算发热时间常数来判断是否存在堵转故障,提高了电动汽车堵转故障检测的准确性。


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    Title :

    Electric vehicle locked-rotor fault detection method, device and equipment, and storage medium


    Additional title:

    电动汽车堵转故障检测方法、装置、设备及存储介质


    Contributors:
    WANG DACHAO (author) / LIN LI (author) / LIANG YILONG (author) / LIN FUHUANG (author) / ZHANG WEI (author)

    Publication date :

    2020-08-25


    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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