LED centralized direct-current power supply system and operating method thereof

Abstract

The invention provides a light emitting diode (LED) centralized direct-current power supply system and an operating method thereof. The system comprises a three-phase input interface, a power supply output interface, N+1 three-phase pulse width modulation (PWM) rectifying power supply modules, N load modules and a power supply management module. The method comprises the following steps of: acquiring output voltage and current on positive and negative output buses, voltage and current of a three-phase input end and control signals and output of the three-phase PWM rectifying power supply modules through the power supply management module, adjusting the duty ratio of the three-phase PWM rectifying power supply modules, and directly converting power frequency alternating current of a power grid into adjustable direct-current voltage through a PWM rectifying power supply, wherein the output power can reach dozes of kilowatts to hundreds of kilowatts or higher and is directly supplied to LEDs of the whole line. The LED centralized direct-current power supply system controlled by the power supply management module realizes cutoff or incorporation of a redundant power supply during system fault or maintenance and monitoring of the LEDS.

Description

technical field [0001] The invention relates to the technical field of an LED centralized DC power supply system, in particular to an LED centralized DC power supply system and an operating method thereof. Background technique [0002] The currently widely used LED drivers all use power supplies below several hundred watts, and each set of LED lamps integrates an independent power supply and an LED lamp, such as figure 1 shown. This power supply method brings the following problems: First, the location and heat dissipation of the power supply should be considered in the design of the lamp. The volume is large, the design of the lamp is limited by the power supply, and the cost increases; second, once the power supply is damaged, the entire lamp is scrapped at the same time, which is high in cost and short in life. 3. The unified dimming control of a plurality of LEDs is not easy to realize. [0003] Aiming at the above deficiencies, the present invention overcomes the abov...

AI Technical Summary

Problems solved by technology

This power supply method brings the following problems: First, the location and heat dissipation of the power supply should be considered in the design of the lamp. The volume is large, the design of the lamp is limited by the power supply, and the cost increases; second, once the power supply is damaged, the entire lamp is scrapped at the same time, which is high in cost and short in life. ; The third is that the unified dimming control of multiple LEDs is not easy to achieve

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