The invention discloses an electric vehicle, a motor controller and a thermal protection method thereof, and aims to avoid thermal damage of a power semiconductor device in the motor controller. The method comprises the steps: in the normal working process of the motor controller, sampling the temperature of a preset sampling point in the motor controller; judging the current working mode of the motor controller, wherein the motor controller has three working modes including a steady state mode, a peak value mode and a locked-rotor mode; and if the temperature of the sampling point exceeds an over-temperature threshold value of the motor controller in the current working mode, controlling the motor controller to stop outputting, wherein the over-temperature thresholds of the motor controller in different working modes are different.

    本申请公开了一种电动汽车、电机控制器及其热保护方法,以避免电机控制器内功率半导体器件出现热损伤。该方法包括:在电机控制器正常工作过程中,采样电机控制器内预设采样点的温度;判断电机控制器当前所处的工作模式,其中电机控制器有稳态模式、峰值模式和堵转模式三种工作模式;若所述采样点的温度超过电机控制器在当前工作模式下的过温阈值,控制电机控制器停止输出;其中电机控制器在不同工作模式下的过温阈值不同。


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    Title :

    Electric automobile, motor controller and thermal protection method thereof


    Additional title:

    一种电动汽车、电机控制器及其热保护方法


    Contributors:
    DU ENLI (author) / CHANG WEI (author) / ZHANG JIAN (author)

    Publication date :

    2021-05-28


    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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