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

A technology of LED lighting and LED driving, applied in the field of power electronics

Active Publication Date: 2015-05-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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...

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

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Embodiment Construction

[0025] The present invention provides a centralized power supply system for LED lighting in a large area and its driving method. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0026] Please refer to figure 1, the present invention provides a centralized power supply system for LED lighting in large-scale areas (such as large-area factory buildings, shopping malls, and underground garages, etc.), and its hardware equipment mainly includes three-phase AC power transmission cables, LED drive controllers, DC Power transmission lines and a large number of LED lighting components (luminaires). In this scheme, LED lamps are appropriately scattered and a...

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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, ...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M7/217
Inventor 秦显慧石宝平杨袁钰周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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