The invention discloses a grounding continuity detection circuit and a charging pile, the grounding continuity detection circuit comprises a capacitance voltage division circuit, the input end of the capacitance voltage division circuit is used for connecting a phase line and a zero line, and the output end of the capacitance voltage division circuit is used for outputting a first voltage division signal; the voltage reduction circuit is connected with the capacitance voltage division circuit and used for carrying out voltage reduction processing on the first voltage division signal and outputting a second voltage division signal; the input end of the photoelectric coupler is connected with the protection grounding wire and the step-down circuit, and the output end of the photoelectric coupler is connected with the grounding end and the pull-up circuit and used for conducting or cutting off according to the connection state of the second voltage division signal and the protection grounding wire; and the control circuit is connected with the photoelectric coupler and the pull-up circuit, and is used for acquiring an analog voltage signal corresponding to a connection node between the photoelectric coupler and the pull-up circuit, and detecting the grounding continuity of the protection grounding wire according to the analog voltage signal. According to the technical scheme, the accuracy of grounding continuity detection of the protection grounding wire can be improved.
本发明公开了一种接地连续性检测电路及充电桩,接地连续性检测电路包括电容分压电路的输入端用于连接相线和零线,电容分压电路的输出端,用于输出第一分压信号;降压电路,与电容分压电路相连,用于对第一分压信号进行降压处理,输出第二分压信号;光电耦合器输入端与保护接地线和降压电路相连,光电耦合器输出端与接地端和上拉电路相连,用于根据第二分压信号和保护接地线的连接状态进行导通或截止;控制电路,与光电耦合器和上拉电路相连,用于采集光电耦合器和上拉电路之间的连接节点对应的模拟电压信号,根据模拟电压信号,检测保护接地线的接地连续性。本技术方案能够提高保护接地线的接地连续性检测的准确性。
Grounding continuity detection circuit and charging pile
接地连续性检测电路及充电桩
2025-04-25
Patent
Electronic Resource
Chinese
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