Three-wire DC Compensation Mode of Classroom LED Lighting Power Supply System
JIN Yonggao
WANG Binggang
Abstract：This paper puts forward a design of three-wire DC compensation mode of classroom LED lighting power supply system. The host transfers the voltage from 220V AC to 380V DC by the APFC rectifier, and then the 380V DC voltage is divided into main and compensation voltage, through voltage divider, supplied to the extensions by three buses. The power of the extension compensation is very small, so low-power buck circuit with simple structure generated compensation voltage to drive the LED units. Because this power supply system adopts DC power supply, this system has less line loss, low compensation voltage and far less switching pulse amplitude. It has the advantages of little EMI, stable operation, low cost, simple maintenance.
Keywords：power bus supplyLED unitsless line losslow EMI
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 77-81 )