Study of high Power Factor Correction for AC-DC converter
碩士 === 雲林科技大學 === 電機工程系碩士班 === 96 === The purpose of this research lies in AC/DC converter for light-emitting-diode (LED) brightness application. The proposed power supply consists of a high power factor rectifier and the buck type converter for DC-DC power conversion. In the proposed high power fac...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/27512534352540467489 |
| Summary: | 碩士 === 雲林科技大學 === 電機工程系碩士班 === 96 === The purpose of this research lies in AC/DC converter for light-emitting-diode (LED) brightness application. The proposed power supply consists of a high power factor rectifier and the buck type converter for DC-DC power conversion. In the proposed high power factor rectifier, the boost type converter is studied. The boost type converter with high power factor is used in the front stage of circuit to convert 85Vac-265Vac ac voltage to 380V dc bus, the both input currents and voltages are the same phase and the waves are similar. The power factor also can up to 99% rated load. The buck type converter for DC-DC power conversion is used in the last stage of circuit to provide the constantly voltage to drive the LED lamps with current control. Experimental results based on 220V ac input voltage, passed through the devising of four devices entity circuits which output voltage and current is 112V/350mA are provided to demonstrate the performance of the proposed converter.
|
|---|