研究生: |
許堡勝 Pao-Sheng Hsu |
---|---|
論文名稱: |
應用於冷陰極管羅友換流器之同步脈波寬度調變控制器 A Synchronous PWM Controller for A CCFL Royer Inverter |
指導教授: |
謝冠群
Guan-Chyun Hsieh |
口試委員: |
梁從主
Tsorng-Juu Liang 羅有綱 Yu-Kang Lo 潘晴財 Ching-Tsai Pan 陳德玉 Dan Chen |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 79 |
中文關鍵詞: | 冷陰極螢光燈 、同步脈波寬度調變控制器 、電流饋入式推挽諧振換流器 |
外文關鍵詞: | Synchronous PWM controller, current fed push-pull resonant inverter, CCFL |
相關次數: | 點閱:640 下載:0 |
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本論文提出一種應用於自激式羅友換流器(self-oscillation Royer inverter)的同步式脈波寬度調變控制器-時滯調節式脈波寬度調變控制器(Dead-Time-Modulated Pulse-Width-Modulaion controller),該控制器主要是由一單穩態電路(Monostable circuit)及一定電流充電器(Constant-current charger)所構成。其回授控制採變壓器一次側回授控制策略,可消除冷陰極螢光燈之溫度計效應﹔在一完整的開關切換週期內,用來參照產生PWM輸出之鋸齒波形是由一固定時間長度之線性充電時間以及一會隨諧振頻率而變的時滯時間(Dead-time)所組成,本論文所使用的同步策略乃是依據羅友換流器的諧振頻率來調節時滯時間的長短,使開關切換的頻率能夠和諧振頻率達成同步化。
本文除了詳細說明所提之電路架構其各元件值之設計考量及設計步驟外,並實際設計出一部由一次測回授控制之同步式脈波寬度調變羅友換流器,然後進行其特性規格之量測,其實驗結果和理論推導十分相符。
This thesis presents a synchronous PWM controller for self-oscillation Royer inverter. The dead-time-modulated PWM (DTM-PWM) controller is composed of a monostable circuit and a constant-current charger (CCC). The controller use the primary-side feedback control strategy to eliminate the thermometer effect occurring in the cold-cathode fluorescent lamp (CCFL).The referred sawtooth is composed with a constant-period charge time and a variable dead-time. The synchronizing strategy is conducted by modulating the dead-time according to the resonant frequency of the Royer inverter.
The design strategy for building the design example is proposed. A DTM-PWM controlled dimmable Royer inverter with two-CCFL by primary-side control is realized and experimented. The results of analysis and theoretical prediction are verified with experiments.
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