Rail transit LED lighting system drive power supply

Abstract

The invention discloses a driving power supply for a rail transit LED lighting system, which includes a filter circuit unit and a constant voltage circuit unit, the output end of the filter circuit unit is connected to the input end of the constant voltage circuit unit, and the output end of the constant voltage circuit unit leads to LED lighting The positive pole of the light power supply and the negative pole of the LED lighting power supply also include a fault detection switching circuit unit and a fault feedback circuit unit. The fault detection switching circuit unit is electrically connected to the positive pole of the LED lighting power supply and the negative pole of the LED lighting power supply. The fault detection switching circuit unit leads to a backup power supply Connecting end and fault detection signal output end; the control end of the fault feedback circuit unit is electrically connected to the fault detection signal output end of the fault detection switching circuit unit, and the fault feedback circuit unit leads to a fault detection external signal end. The driving power supply of the rail transit LED lighting system of the present invention can automatically detect failures, and can automatically switch to the backup power supply in time when a failure occurs.

Description

technical field [0001] The invention relates to the technical field of rail transit lighting power supplies, in particular to a rail transit LED lighting system driving power supply. Background technique [0002] In existing rail vehicles, lighting lamps are installed on the top of the passenger compartment and the tops of the through passages between two adjacent carriages, and the lighting lamps usually adopt LED lights. At present, the driving power supply of the lighting lamps on rail vehicles generally includes a switching power supply and a voltage stabilization module, which converts the rail vehicle power supply into a power supply of the voltage required by the lighting lamps and stabilizes the voltage. The voltage-stabilized output point of the driving power supply is connected to the lighting lamps on the rail vehicles . In the existing power supply structure of rail vehicle lighting lamps, when the driving power fails, it is easy to cause a power outage of the r...

AI Technical Summary

Problems solved by technology

In the existing power supply structure of rail vehicle lighting lamps, when the driving power supply fails, it is easy to cause a power outage of the rail vehicle lighting system, requiring the staff on the rail vehicle to manually switch the backup power supply, which not only affects the operation of the vehicle, but also increases the workload of the staff. labor burden

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