The invention relates to a power supply circuit of a large-current load, which belongs to the technical field of vehicle-mounted power distribution, and comprises a current sampling circuit, a power circuit, an overcurrent protection circuit, a control circuit and a driving circuit, so that the power supply circuit has the protection functions of power supply reverse polarity protection, input end and output end voltage monitoring, forward current protection, reverse current protection and the like. The vehicle-mounted low-voltage large-current load overcurrent protection circuit has the advantages that the vehicle-mounted low-voltage large-current load overcurrent protection circuit has the rapid current limiting capacity under the large-current impact load and the rapid breaking capacity under the short-circuit fault, more accurate overcurrent protection is provided for the vehicle-mounted low-voltage large-current load, the vehicle-mounted low-voltage large-current load overcurrent protection circuit can bear multiple times of overcurrent or short-circuit impact, self-recovery can be achieved after the fault disappears, and maintenance-free The overcurrent or short-circuit turn-off time is very short, so that the wire harness does not need to bear large current for a long time, the cross sectional area of the wire harness can be effectively reduced, the weight of the wire harness is reduced, and the cost is reduced.

    本发明涉及一种大电流负载的供电电路,属于车载配电技术领域,包括电流采样电路、功率电路、过流保护电路、控制电路和驱动电路,使得本发明具备电源反极性保护、输入端和输出端电压监控、正向电流保护、反向电流保护等保护功能,且具有大电流冲击负载下快速限流能力和短路故障下的快速分断能力,为车载低压大电流负载提供更精确的过流保护,并且本发明能够承受多次过流或者短路冲击,还能够在故障消失后自恢复,实现免维护;由于本发明的过流或短路关断时间非常短,使得线束不必长时间承受很大的电流,可以有效减小线束横截面积,从而减轻线束重量降低成本。


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    Title :

    Power supply circuit of large-current load


    Additional title:

    一种大电流负载的供电电路


    Contributors:
    LIU YONGCHUN (author) / QIN TAO (author) / LI ZHAOJIE (author) / ZHAO XIN (author)

    Publication date :

    2023-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr



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