Centralized power supply system for LED illumination in large area and driving method of centralized power supply system

Abstract

The invention provides a centralized power supply system for LED illumination in a large area and a driving method of the centralized power supply system. Aiming at the design of an LED illumination system in the range of the large area, LED lamps are distributed according to actual demands and form a plurality of branches through appropriate series-parallel connection, and driving and control devices are concentrated in one place to be convenient for management and maintenance. Three-phase power-frequency alternating current is used as an input power supply, an AC-DC matrix converter is applied to a high-power LED illumination driving system, and an electrolytic capacitor is removed, so that the working life of the driver is prolonged, and meanwhile three-phase sinusoidal input current and unity power factors can be obtained. The output side of the AC-DC matrix converter provides an isolated constant current power supply for each LED branch through double-tube forward converters. The forward converters share a bridge arm, and the number of switching tubes is reduced. The modulation of the AC-DC matrix converter and the double-tube forward converters is realized through microprocessing chips, and the constant current control of the LED branches is realized.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and relates to a drive control technology for a high-power LED lighting system, in particular to a centralized power supply system for LED lighting in a large area and a driving method thereof. Background technique [0002] In recent years, energy conservation and emission reduction has always been an important topic to promote the sustainable development of my country's society and economy. Since lighting power consumption accounts for about 10% to 13% of the country's total electricity consumption, lighting energy saving is an important part of energy saving and emission reduction. With the technological breakthrough of the third-generation semiconductor material gallium nitride, the advent and industrialization of high-brightness light-emitting diodes have brought about an innovation in lighting technology. It has advantages that traditional lighting sources such as high efficiency, ...

AI Technical Summary

Problems solved by technology

The AC-DC matrix converter, also known as the matrix rectifier, can realize the conversion of three-phase alternating current and direct current. Its topology without electrolytic capacitors is very suitable for centralized high-power LED drive systems. No related research has been carried out on LED drivers based on matrix converters. This solution has important application value in the occasion of large-area area lighting

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