Hierarchical starting mining intrinsic safety power supply

Abstract

The invention provides a hierarchical starting mining intrinsic safety power supply which at least comprises a DC / DC (direct-current) power supply unit, a safety grid circuit, a storage battery, a power supply control circuit, a storage battery power supply control circuit, a voltage comparison unit and a control unit. The DC / DC power supply unit is used for receiving direct current and boosting or reducing voltage of the direct current, the voltage comparison unit is used for acquiring the voltage of the storage battery and comparing the voltage with set reference voltage, the DC / DC power supply unit is electrically connected with the safety grid circuit through the power supply control circuit, the storage battery is electrically connected with the safety grid circuit through the storage battery power supply control circuit, an input end of the voltage comparison unit is electrically connected with the storage battery, an output end of the voltage comparison unit is electrically connected with the DC / DC power supply unit, the DC / DC power supply unit supplies power for the control unit, the control unit outputs control signals to the power supply control circuit and the storage battery power supply control circuit and is further electrically connected with a positive electrode of the storage battery. The hierarchical starting mining intrinsic safety power supply can avoid false triggering caused by high current in starting of the intrinsic safety power supply, and stable and persistent operation of the intrinsic safety power supply can be guaranteed, so that the on-load capacity of the intrinsic safety power supply is enhanced.

Description

technical field [0001] The invention relates to an intrinsically safe power supply, in particular to a graded start-up mine intrinsically safe power supply. Background technique [0002] Intrinsically safe power supply is intrinsically safe power supply. This kind of power supply has intrinsically safe performance in the highest output voltage and maximum current under normal operation and fault conditions. Intrinsically safe power supplies are widely used in mines. The standby time of current mine intrinsically safe power supplies is not less than 2 hours. However, with the popularization and application of underground emergency avoidance systems in mines, the intrinsically safe The standby time of the power supply is not less than 96 hours, but the standby time of the intrinsically safe power supply in the prior art is far from reaching the 96-hour standby requirement, which is not conducive to the stable operation of the emergency avoidance system in the mine, and is like...

AI Technical Summary

Problems solved by technology

Intrinsically safe power supplies are widely used in mines. The standby time of current mine intrinsically safe power supplies is not less than 2 hours. However, with the popularization and application of underground emergency avoidance systems in mines, the intrinsically safe The standby time of the power supply is not less than 96 hours, but the standby time of the intrinsically safe power supply in the prior art is far from reaching the 96-hour standby requirement, which is not conducive to the stable operation of the emergency avoidance system in the mine, and is likely to cause safety hazards; and, now The intrinsically safe power supply in the existing technology often adopts a direct start-up method when starting, and the instantaneous current at startup is large, which has a large impact on the input intrinsically safe power supply, causing the intrinsically safe power supply to be unable to operate stably for a long time, thus making the intrinsically safe power supply The load capacity is poor, and the stable operation of the load equipment cannot be guaranteed

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