An electric leakage detection device (10) detects electric leakage in a high-voltage unit that connects a power storage unit (20) and a load by means of a power supply line while being insulated from a ground line, and a Y capacitor (CY) is connected between a current path between the power storage unit (20) and the load and the ground line. A drive unit (11) of a leakage detection device (10) charges or discharges a Y capacitor (CY) by outputting a rectangular wave voltage to a current path between a power storage unit (20) and a load via a drive coupling capacitor (Cd1). The leakage detection unit (12) determines the presence or absence of leakage between the current path and the ground on the basis of a transition in which the voltage at the measurement point of the current path changes in accordance with the charging or discharging of the Y capacitor (CY) converges to the original voltage.
一种漏电检测装置(10),在与地线绝缘的状态下检测将蓄电部(20)与负载利用电源线进行了连接的高压部的漏电,在蓄电部(20)与负载之间的电流路径同地线之间连接有Y电容器(CY)。漏电检测装置(10)的驱动部(11)经由驱动用耦合电容器(Cd1)向蓄电部(20)与负载之间的电流路径输出矩形波电压,来使Y电容器(CY)充电或放电。漏电检测部(12)根据与Y电容器(CY)的充电或放电相应地变化的电流路径的测定点的电压向原来的电压收敛的推移,来判定电流路径与地线之间有无漏电。
Electric leakage detection device and vehicle power supply system
漏电检测装置、车辆用电源系统
2022-11-11
Patent
Elektronische Ressource
Chinesisch
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