The invention discloses a ground fault protection circuit, device and method, and relates to the technical field of automatic control. The circuit comprises a micro-control unit, N loads, a detection module and a protection module corresponding to each load, and (N-1) multiplexing modules, the protection module is used for closing the load connected with the protection module when the grounding end connected with the corresponding detection module has a grounding fault; the detection module is used for inputting a detection signal to the micro-control unit, and the detection signal is used for indicating whether the grounding end connected with the detection module has a grounding fault or not; and the micro-control unit is used for controlling to reduce the total power of the two loads and controlling the multiplexing module to be switched on when the grounding end connected with one detection module has the grounding fault or the grounding end connected with the other detection module has the grounding fault. According to the invention, the power supply stability of the vehicle-mounted electronic control system is improved.
本发明公开一种断地故障保护电路、装置及方法,涉及自动控制技术领域。电路包括微控制单元、N个负载、每个负载对应的检测模块和保护模块,以及(N‑1)个复用模块;保护模块,在对应的检测模块连接的接地端发生断地故障时,关闭保护模块连接的负载;检测模块,向微控制单元输入检测信号,检测信号用于指示检测模块连接的接地端是否发生断地故障;微控制单元,在一个检测模块连接的接地端发生断地故障或其他检测模块连接的接地端发生断地故障时,控制降低两个负载的总功率,并控制复用模块导通。本发明提升了车载电子控制系统的供电的稳定性。
Off-ground fault protection circuit, device and method
一种断地故障保护电路、装置及方法
2022-09-30
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen |
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