The invention relates to an insulation monitor (1) for a high-voltage on-board electrical system (2) of a motor vehicle, the on-board electrical system (2) comprising an HV battery (3) and being electrically isolated from a vehicle ground (PA), a Y capacitor (CYP, CYN) being provided between a positive potential (H +) and the vehicle ground (PA) and between a negative potential (H-) and the vehicle ground (PA), the insulation monitor (1) having a current source (4) or a voltage source, the insulation monitor (1) further comprises a voltmeter (5) for measuring at least one of the potentials (H +, H-), the insulation monitor (1) being configured to apply a negative current (I) by means of the current source (4) when the potential (H +) measured by the voltmeter (5) is above a predetermined upper limit value and to apply a positive current (I) by means of the current source (4) when the potential (H +) measured by the voltmeter (5) is below a predetermined lower limit value. The positive current is limited to a maximum allowable contact current in the event of an insulation fault, and the magnitude of the insulation resistance (RisoP, RisoN) is deduced from the voltage measured by the voltmeter (5) and from the fed-in recharging current (I).

    本发明涉及一种用于机动车高压车载电网(2)的绝缘监测器(1),其中,车载电网(2)包括HV电池(3)并与车辆地(PA)电气隔离,其中,在正电位(H+)与车辆地(PA)之间以及在负电位(H‑)与车辆地(PA)之间分别设有Y电容(CY_P,CY_N),其中,绝缘监测器(1)具有电流源(4)或电压源,其中,绝缘监测器(1)还包括用于测量至少其中一个所述电位(H+,H‑)的电压表(5),其中,绝缘监测器(1)配置用于在由电压表(5)测量的电位(H+)高于预定上限值时借助电流源(4)加载负电流(I),并且用于在由电压表(5)测量的电位(H+)低于预定下限值时借助电流源(4)加载正电流(I),正电流被限制到在绝缘故障情况下的最大允许接触电流,并依据由电压表(5)测量的电压和依据所馈入的再充电电流(I)推断出绝缘电阻(Riso_P,Riso_N)的大小。


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    Titel :

    Insulation monitor and operation method thereof


    Weitere Titelangaben:

    绝缘监测器及其运行方法


    Beteiligte:
    AUNER MARTIN (Autor:in) / CANDIER ALAIN (Autor:in) / BOEHM UWE (Autor:in)

    Erscheinungsdatum :

    15.03.2024


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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