The invention relates to a high-voltage system (1) for a motor vehicle, comprising:-an electrical high-voltage energy store (2), which has a store-side HV connection (5a, 5b),-a high-voltage on-board electrical system (3), which has an on-board electrical system-side HV connection (6a, 6b) and a capacitance arrangement (10), which comprises an X capacitance (Cx) and two Y capacitances (Cy1, Cy2), a switching device (4) connected to the HV connection (5a, 5b, 6a, 6b) for connecting the high-voltage energy store (2) to the high-voltage on-board electrical system (3), a discharge device (11) for discharging the capacitance arrangement (10), which discharge device has a discharge resistor (Re) connected to the on-board electrical system-side HV connection (6a, 6b) and a passive discharge circuit (12a, 12b) for each Y capacitance (Cy1, Cy2), the discharge circuits (12a, 12b) are designed to discharge the Y capacitance (Cy1, Cy2) and each have at least one diode (D) for this purpose, said diode (D) being polarized in the cut-off direction with respect to the normal polarity of the voltage (Uy1, Uy2) falling across the Y capacitance (Cy1, Cy2) when the switching device (4) is closed. The at least one diode (D) of a discharge circuit (12b) can be polarized in the conduction direction by changing the polarity of the voltage (Uy2) at the associated Y capacitance (Cy2) for discharging the Y capacitance (Cy1, Cy2), said polarity changing being caused by charging the Y capacitance (Cy1, Cy2) and by a potential coupling of the on-board network-side HV connection (6a, 6b) determined by the discharge resistance.
本发明涉及一种用于机动车的高压系统(1),所述高压系统具有:‑电气的高压能量储存器(2),其具有储存器侧的HV连接端(5a、5b),‑高压车载电网(3),其具有车载电网侧的HV连接端(6a、6b)和电容布置结构(10),所述电容布置结构包括一个X电容(Cx)和两个Y电容(Cy1、Cy2),‑与HV连接端(5a、5b、6a、6b)连接的开关装置(4),以用于将高压能量储存器(2)与高压车载电网(3)接通,‑用于对电容布置结构(10)放电的放电装置(11),所述放电装置具有与车载电网侧的HV连接端(6a、6b)连接的放电电阻(Re)和对于每个Y电容(Cy1、Cy2)一个被动的放电电路(12a、12b),其中,这些放电电路(12a、12b)设计为用于对Y电容(Cy1、Cy2)放电,并且这些放电电路为此分别具有至少一个二极管(D),其中,所述二极管(D)关于在开关装置(4)闭合时在Y电容(Cy1、Cy2)上降落的电压(Uy1、Uy2)的正常极性沿截止方向极化,并且一个放电电路(12b)的所述至少一个二极管(D)通过在所属的Y电容(Cy2)上的电压(Uy2)的极性更换为了对Y电容(Cy1、Cy2)放电而能沿导通方向极化,所述极性更换通过对Y电容(Cy1、Cy2)充电并且通过车载电网侧的HV连接端(6a、6b)的由放电电阻决定的电位耦合引起。
High-voltage system for motor vehicle having passive discharge circuit for Y-capacitor
用于机动车的具有用于Y电容的被动的放电电路的高压系统
2025-01-17
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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