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研究生:黃偉銓
研究生(外文):Wei-Chiuan Huang
論文名稱:具前級功因調整器之半橋LLC諧振式電源轉換器研製
論文名稱(外文):ANALYSIS AND IMPLEMENTATION OF A HALF-BRIDGE LLC RESONANT CONVERTER WITH FRONT-END POWER FACTOR CORRECTION
指導教授:李清元李清元引用關係
指導教授(外文):Ching-Yuan Lee
學位類別:碩士
校院名稱:大同大學
系所名稱:電機工程學系(所)
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:64
中文關鍵詞:LLC諧振式轉換器功因修正
外文關鍵詞:LLC resonant converterpower factor correction
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本文將設計及製作一個半橋LLC諧振式電源轉換器以提供大尺寸的液晶電源使用。在本文中以主動式昇壓式功因修正電路將工作於連續電流模式,使其能達到高功因,並且有效降低輸入電流諧波之要求。其後級之半橋LLC諧振式轉換器藉由推導電路阻抗、諧振電感比例值與品質因數得到轉移函數,以及利用適當的諧振電路的設計與切換頻率的調變的方式達到輸出電壓穩定,並且令功率開關具有零電壓切換之功用,以降低功率開關的切換損失。
文中將會探討LLC串聯諧振式轉換器的工作模式、交流與直流特性分析作為諧振電路的設計與元件選用。最後實際製作一具有高功因的LLC諧振式電源轉換器,其轉換器輸入電壓為交流110V到230V,輸出直流容量為66V/7.27A,輸出瓦數為480W,並經由實驗結果來驗證其理論。
This thesis presents a half-bridge LLC resonant converter for large scale LCD TV power supply. The circuit configuration consists of a boost converter for power factor correction and a half-bridge LLC resonant converter. The PFC circuit operates in continuous current mode to achieve a high power factor and reduces the input current harmonic. The transfer function of the LLC resonant converter can be obtained by using the circuit impedance, ratio of resonant inductance, and quality factor. With proper selection of the resonant tank and modulation of the operation switching frequency, the proposed circuit can achieve zero voltage switching (ZVS), stabilize the output voltage, and then reduce the switching loss.
In addition, the operation modes and dc characteristics are discussed for designing the resonant tank. A prototype of a 480W-LLC resonant converter having a high power factor with AC input 110V~230V and DC output 66V/7.27A is constructed. Experimental results of the ZVS prove that the proposed circuit can achieve the requirements.
中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機 3
第二章 功率因數修正之簡介 6
2.1 功率因數修正原理 6
2.2 功率因數的定義 7
2.3 功率因數修正電路拓撲 9
2.3.1 昇壓式轉換器功率因數修正方式 11
2.3.2 功率因數修正設計方式 12
第三章 LLC諧振式轉換器原理與分析 15
3.1 LLC諧振式轉換器簡介 15
3.2 LLC諧振式轉換器動作原理 16
3.3 LLC諧振式轉換器特性分析 22
3.3.1 直流特性分析 22
3.3.2 操作區域之分析 24
3.3.3 兩諧振電感比例值之探討 25
3.4 諧振槽參數設計 30
3.5 零電壓切換之條件 34
第四章 半橋LLC諧振式電源轉換器設計架構 39
4.1 功率因數修正級 39
4.2 LLC諧振式轉換器 43
4.2.1 LLC諧振槽設計 43
4.2.2變壓器圈數比設計 45
第五章 實驗結果 47
5.1功率因數修正級之實驗結果 48
5.2 LLC諧振式轉換器實驗結果 55
第六章 結論 61
參考文獻 62
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