A method for protecting an in-vehicle charging device (100) comprises the steps of detecting phase voltages and neutral voltages from an electrical grid, detecting a current signal representative of a compensation current generated by a compensation circuit, combining the phase voltages together to obtain a unipolar voltage signal, squaring the current signal and the unipolar voltage signal to obtain a first square wave current wave and a second square wave voltage wave, combining the first square wave and the second square wave together so as to generate an output signal with a first logic level when the first square wave and the second square wave are in phase, and generate an output signal having a second logic level when the first square wave and the second square wave are out-of-phase, generate a voltage that increases in proportion to the duration of each section of the output signal having the first value, compare the value of the voltage to a limit value, and generate an alarm signal when the voltage level exceeds the limit value.

    一种用于保护车载充电设备(100)的方法包括以下步骤:检测来自电网的相电压和中性电压,检测表示由补偿电路生成的补偿电流的电流信号,将相电压组合在一起以获得单极电压信号,对电流信号和单极电压信号进行平方以获得第一方波电流波和第二方波电压波,将第一方波和第二方波组合在一起,以便当第一方波和第二方波同相时生成具有第一逻辑电平的输出信号,并且当第一方波和第二方波异相时生成具有第二逻辑电平的输出信号,生成与具有第一值的输出信号的每个部段的持续时间成比例增加的电压,将电压的值与极限值进行比较,并且当电压电平超过极限值时生成警报信号。


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    Title :

    Method and circuit for protecting in-vehicle charging device


    Additional title:

    用于保护车载充电设备的方法和电路


    Contributors:

    Publication date :

    2023-09-19


    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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