The invention relates to the technical field of automobiles, in particular to an automobile load control circuit, method and device, and the circuit comprises a short circuit detection loop, a logic control loop and a drive loop. The short-circuit detection loop comprises a first power supply, a first resistor, a load and a first switch which are sequentially connected in series; the driving loop comprises a second resistor and a load, one end of the second resistor is electrically connected with the load and the first switch, and the other end of the second resistor is electrically connected with the logic control loop; the logic control loop is electrically connected with the driving loop and is used for detecting a voltage value of one end, connected with the load, of the second resistor; a high-power short circuit detection resistor does not need to be used, so that the production cost is reduced; whether the load is short-circuited or not can be obtained only by obtaining the voltage value of one end of the second resistor, and when the load is in a normal state, the driving loop is controlled to drive the load to operate normally, so that the safety of load operation can be ensured, and dangers in the vehicle driving process are avoided.
本发明涉及汽车技术领域,具体是一种汽车负载控制电路、控制方法及控制装置,电路包括短路检测回路、逻辑控制回路和驱动回路;短路检测回路包括依次串联连接的第一电源、第一电阻、负载和第一开关;驱动回路包括第二电阻和负载,第二电阻的一端分别与负载和第一开关电连接,第二电阻的另一端与逻辑控制回路电连接;逻辑控制回路与驱动回路电连接,逻辑控制回路用于检测第二电阻与负载连接一端的电压值;本发明无需使用大功率的短路检测电阻,降低了生产成本;仅获取第二电阻一端的电压值,就可获取负载是否出现短路的情况,并在负载处于正常状态时,控制驱动回路驱动负载正常运行,这能够保证负载运行的安全性,避免造成车辆行驶过程中发生危险。
Automobile load control circuit, control method and control device
一种汽车负载控制电路、控制方法及控制装置
2022-06-14
Patent
Electronic Resource
Chinese
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 / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
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