DC (Direct Current) centralized power supply management method and device for LED (Light Emitting Diode) lights

Abstract

The invention relates to a DC (Direct Current) centralized power supply management method for LED (Light Emitting Diode) lights, the method comprises the following steps that: a three-phase four-wire power supply is divided into an A phase, a B phase and a C phase to enter each AC (Alternating Current) / DC rectification module to be rectified after the three-phase four-wire power supply enters a power switch of a DC centralized power supply management device for the LED lights; the three-phase four-wire power supply enters a DC output module for voltage stabilization and constant current control after being rectified, and the three-phase four-wire power supply is output and provided for LED use for each branch circuit through a 110-220V DC voltage. In the invention, a design that one high-power DC power supply is formed by multiple power supply-power modules and provides power supplies for multiple LED lights is adopted, therefore, the advantages of centralized power supply, few fault points and convenience for overhauling can be achieved, and the invention is particularly suitable for being used in tunnel LED lights; a drawer type design is adopted for power modules, therefore, when a certain power supply-power module is damaged, the power supply-power module can be achieved to be directly drawn out, and a new power module can be conveniently replaced, and the power modules can be designed to be redundant modules for standby according to the practical demands on site; combination is multi-module, switching, maintenance and emergency are convenient, and ultra-high-power transmission can be achieved.

Description

technical field [0001] The invention relates to the field of LED lamps and management, in particular to a method and device for managing DC centralized power supply of LED lamps. Background technique [0002] At present, the tunnel LED lighting is powered by 220V AC, and the AC / DC conversion circuit and constant current circuit are included in the lamp. Since the AC / DC conversion contains switching high-frequency transformers and switching electronic devices, it will generate large high-order harmonics and low power factor, which will seriously affect the safe operation of the power grid, and even generate harmonic voltages that will affect the life of the lamp power supply. The number of switching power supplies is the same as the number of lamps, and it is difficult to dissipate heat. They are scattered in each lamp, there are many components, and the number of fault points also increases. It is inconvenient to maintain and cannot be managed centrally. [0003] In additio...

AI Technical Summary

Problems solved by technology

Since the AC / DC conversion contains switching high-frequency transformers and switching electronic devices, large high-order harmonics and low power factors will be generated, which will seriously affect the safe operation of the power grid, and even generate harmonic voltages that will affect the life of the lamp power supply.

The number of switching power supplies is the same as the number of lamps, and it is difficult to dissipate heat. They are scattered in each lamp, and there are many devices and fault points. The maintenance is inconvenient and cannot be managed centrally.

[0003] In addition, at present, the service life of LED lamps usually reaches 5-6 years, but because the service life of AC / DC power supply is generally about 3 years, the service life of LED lamps is greatly reduced. At the same time, due to the use in tunnels, it is dangerous to replace and repair lamps high sex

Images