The invention relates to a method for determining at least one current capacitance value (38) of a Y capacitor (34, 36) of an on-board power supply system (12) of a motor vehicle (10), in which a high-voltage energy store (16) of the on-board power supply system (12) is electrically connected to an energy store outer part (30) by means of a switching device (40) of the on-board power supply system (12), and in which at least one current capacitance value (38) of a Y capacitor (34, 36) of the on-board power supply system (12) is determined. A first insulation resistance (42) is determined on the basis of a capacitance value (48) of the on-board electrical system (12) by means of a first insulation monitor (20) in an energy store inner part (18) of the on-board electrical system (12), and a second insulation resistance (44) of the on-board electrical system (12) is determined by means of at least one central second insulation monitor (28) of the energy store outer part (30), the first insulation resistance (42) is compared with the second insulation resistance (44). In order to determine a first insulation resistance (42) of the on-board electrical system (12) by means of the first insulation monitor (20), the capacitance value (48) is adjusted as a function of the comparison result in such a way that the first insulation resistance (42) tends to the second insulation resistance (44). The invention also relates to an on-board electrical system (12).
本发明涉及一种用于确定机动车(10)的车载电网(12)的Y电容(34,36)的至少一个当前电容值(38)的方法,其中,借助该车载电网(12)的切换装置(40)将车载电网(12)的高压蓄能器(16)电连接至蓄能器外部分(30),并且其中,借助在车载电网(12)的蓄能器内部分(18)中的第一绝缘监控器(20)依据车载电网(12)的电容值(48)来确定第一绝缘电阻(42),其中,借助该蓄能器外部分(30)的至少一个中央第二绝缘监控器(28)来确定该车载电网(12)的第二绝缘电阻(44),并将第一绝缘电阻(42)与第二绝缘电阻(44)相比较。为了借助第一绝缘监控器(20)确定车载电网(12)的第一绝缘电阻(42),根据所述比较结果按下述方式调整电容值(48),即,使得第一绝缘电阻(42)趋同于第二绝缘电阻(44)。本发明还涉及一种车载电网(12)。
METHOD FOR DETERMINING AT LEAST ONE PRECURRENT CAPACITANCE VALUE OF Y CAPACITANCE OF HIGH-
用于确定高压车载电网的Y电容的至少一个当前电容值的方法以及电子计算装置
2023-09-05
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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