臺灣博碩士論文加值系統

本充電器整合無橋式升壓功因修正電路及全橋LLC諧振電路成一單級架構之高功因充電器，應用兩組轉換器以分壓輸入、輸出分流方式完成高效率高功因及降低元件電壓與電流應力之鋰電池充電器。結合無橋功因修正技術與全橋LLC諧振轉換器成一單級架構，使本充電器同時擁有以下特點：(1)無橋架構，降低整流電路損失；(2)利用諧振技術使功率開關具零電壓切換與輸出整流二極體具零電流切換之優點，提高電路效率；(3) 定電壓與定電流調頻充電之功率之操作，簡化切換開關觸發控制電路複雜度，並可大範圍調載；(4)兩組轉換器分壓輸入分流輸出，分攤了電壓與電流，減少各電路元件所承受之電壓電流應力；(5)兩組功因修正電路交錯式操作，使電路達到高功因並分攤電流容量，提高負擔高功率瓦數電池負載之能力。本文完成一具有高功因、高效率、降低元件應力、具電氣隔離、具零電壓切換及可大範圍調載等特色之高品質充電器。本文最終以輸入電壓為市電220伏特之2k瓦功率輸出之充電器，經實驗結果得出，滿載時效率達到87.5%，功率因數高於0.99，電路最高效率為90%。

This thesis proposes a high-efficiency and high-power factor lithium battery charger which integrates a bridgeless boost-type power-factor-correction converter and a full bridge LLC resonant circuit to comprise a single-stage topology. The proposed lithium battery charger will be featured with high-efficiency, high power-factor and reduced current and voltage stresses on components by introducing a pair of converters using series-input and parallel-output mechanism. By merging the bridgeless power-factor-correction technique and the full bridge LLC resonant circuit into a single-stage structure, the proposed battery charger achieves the advantages of: (1) bridgeless structure reducing circuit losses;(2) resonant technique usage furnishing power switches with zero-voltage-switching and output stage diodes with zero-current-switching and enhancing the circuit efficiency; (3) constant current and voltage charging power regulation with frequency modulation scheme simplifying the trigger circuit complexity and widening the charging power range; (4) series-input and parallel-output dual converters topology sharing current and voltage stresses and reducing the component rating; (5) paired interleaved power-factor-correction operation sharing current loading and thus increasing charging battery size. Hopefully, this project aims at accomplishing a high power lithium battery charger with high power-factor, high-efficiency, low component rating, electric isolation, zero-voltage-switching and wide charging power range.

摘要.................................................. i
Abstract..................................................ii
誌謝..................................................iii
目錄..................................................iv
表目錄..................................................vi
圖目錄..................................................vii
第一章 緒論..................................................1
1.1研究背景..................................................1
1.2研究動機與目的..................................................2
1.3內容綱要..................................................4
第二章 單級高功因高效率轉換電路..................................................5
2.1電源轉換器架構..................................................5
2.1.1 雙級轉換架構..................................................5
2.1.2 單級轉換架構..................................................5
2.2主動式功率因數修正器..................................................6
2.3單級高功因轉換電路..................................................7
2.4 諧振轉換器..................................................8
2.4.1 LC串聯諧振轉換器..................................................9
2.4.2 LC並聯諧振轉換器..................................................10
2.4.3 串並聯諧振轉換器..................................................11
2.4.4 LLC諧振轉換器..................................................12
第三章 充電器電路操作原理..................................................13
3.1電路架構..................................................13
3.1.1 無橋升壓式功因修正器..................................................14
3.1.2 交錯式功因修正技術..................................................19
3.1.3 LLC全橋諧振轉換器..................................................21
3.1.4 無橋單級轉換器..................................................24
3.1.5 輸入分壓式架構..................................................26
3.1.6 輸出分流式架構..................................................27
3.2 工作階段分析..................................................28
3.3 電路規格與設計..................................................38
第四章 充電器量測分析..................................................43
4.1 充電器實測波形..................................................43
4.2 實驗結果分析..................................................59
4.2.1充電器CC-CV充電測試結果..................................................59
4.2.2充電器效能分析..................................................60
第五章 結論..................................................61
參考文獻..................................................62
Extended Abstract..................................................66

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