Rail Transit Screen Door Uninterruptible Power Supply and Its Working Method

Abstract

The invention relates to the technical field of electrical control of a rail transit screen door, in particular to an uninterruptible power supply for a rail transit screen door and a working method thereof. Uninterruptible power supply for rail transit screen doors, including mains input bus, AC220V AC bus, DC24V DC bus and DC110V DC bus, ZL rectifier module, NB inverter module, KG switching power supply module, JT static electronic switching device and DN electrical energy storage unit. The uninterruptible power supply for the rail transit screen door and the working method thereof of the present invention have less failures and fewer failure points, and only one single point of failure of the battery exists, which can be eliminated by backup of two sets of batteries. Under normal circumstances, AC power supply does not need to be converted, and DC requires AC / DC primary power conversion. The investment of this solution is small, and the safety and reliability factor is high. The battery directly supplies power to DC110V without any conversion link. This solution is more reliable for battery backup.

Description

technical field [0001] The invention relates to the technical field of electrical control of a rail transit screen door, in particular to an uninterruptible power supply for a rail transit screen door and a working method thereof. Background technique [0002] In the rail transit system, the use of screen doors not only ensures the safety of the platform, but also brings obvious energy-saving effects. It is consistent with the architectural style of the station and has a strong sense of integrity, creating a quiet, fresh and modern waiting environment. Passengers left a good impression. The rail transit screen door system is a primary load, and its power supply system adopts UPS power supply, which is mainly composed of two parts: one is the driving power system, and the other is the control power system. For its electrical principle, please refer to figure 1 , which works as follows: [0003] 1) When the mains is normal, close QF1, and the mains will output 220V AC (cont...

AI Technical Summary

Problems solved by technology

[0012] f. The two DC110V control power supply modules are damaged, and the DC110V control has no power supply;

[0013] 2) There are many failure points: there are three single points of failure in this scheme using a single UPS power supply, namely the battery, battery boost and inverter

[0015] 4) The battery backup power supply of this scheme needs to go through the battery boost, inverter and AC / DC module to supply external power. There are many power conversion links after passing through, the power consumption is large, and the possibility of failure increases

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