The invention provides an electric automobile, a motor controller, and a low-voltage load power supply circuit and method of the motor controller. According to the low-voltage load power supply circuit of the motor controller, when the motor controller is in a working state, if a power supply voltage provided by a low-voltage power supply is greater than a preset voltage threshold, a switch moduleis in a first conduction state, and the low-voltage power supply supplies power to a low-voltage load in the motor controller in the first conduction state of a switch module; and if the power supplyvoltage provided by the low-voltage power supply is not greater than the preset voltage threshold, the switch module is in a second conduction state, and a standby power supply supplies power to thelow-voltage load in the motor controller in the second conduction state of the switch module, so that the power supply reliability of the low-voltage load of the motor controller is improved, and theproblem of low power supply reliability of an existing low-voltage load power supply method of the motor controller is solved.

    本公开提出了一种电动汽车、电机控制器及其低压负载供电电路与方法,该电机控制器的低压负载供电电路通过当电机控制器处于工作状态时,若低压供电电源提供的供电电压大于预设电压阈值,则开关模块处于第一导通状态,低压供电电源在开关模块的第一导通状态下向电机控制器中的低压负载供电;若低压供电电源提供的供电电压不大于预设电压阈值,则开关模块处于第二导通状态,备用电源在开关模块的第二导通状态下向电机控制器中的低压负载供电,以此提高电机控制器的低压负载的供电可靠性,解决了现有的电机控制器的低压负载供电方法存在供电可靠性低的问题。


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    Title :

    Electric automobile, motor controller and low-voltage load power supply circuit and method of motor controller


    Additional title:

    一种电动汽车、电机控制器及其低压负载供电电路与方法


    Contributors:
    FAN ZHIFANG (author) / ZHOU TAO (author) / LIN XIAOFENG (author) / HUANG QI (author)

    Publication date :

    2020-07-24


    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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