The invention relates to a charging pile AC controller grounding detection circuit and method. The circuit comprises a current limiting module, an optocoupler isolation module and a judgment module, wherein the current limiting module is connected in series between the grounding end of a charging pile AC controller and the ground, and is used for receiving an AC signal outputted by the grounding end of the charging pile AC controller, and generating a current reduction signal according to the AC signal; the optocoupler isolation module is connected in series in a grounding loop of the currentlimiting module and is used for receiving the current reduction signal and generating an optocoupler isolation signal according to the current reduction signal; and the judgment module is connected with the output end of the optocoupler isolation module and is used for receiving the optocoupler isolation signal and judging whether the charging pile AC controller has a grounding open circuit faultor not according to the optocoupler isolation signal. According to the invention, the grounding open circuit fault of the charging pile AC controller can be detected in time, the situation that the personal and property safety of a user is endangered due to the fault is avoided, and the working safety of the charging pile is improved.
本申请涉及一种充电桩交流控制器接地检测电路及方法,所述电路包括:限流模块,串联于所述充电桩交流控制器的接地端与地之间,用于接收所述充电桩交流控制器的接地端输出的交流信号并根据所述交流信号生成降流信号;光耦隔离模块,串联于所述限流模块的接地回路中,用于接收所述降流信号并根据所述降流信号生成光耦隔离信号;判断模块,与所述光耦隔离模块的输出端连接,用于接收所述光耦隔离信号并根据所述光耦隔离信号判断所述充电桩交流控制器是否存在接地断路故障。本申请能够及时地检测出充电桩交流控制器的接地断路故障,避免发生因该故障导致的危及用户的人身和财产安全的情况,提高了充电桩工作的安全性。
Charging pile AC controller grounding detection circuit and method
充电桩交流控制器接地检测电路及方法
2020-07-31
Patent
Electronic Resource
Chinese
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