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研究生:李英竹
研究生(外文):Ying-Zhu Lee
論文名稱:具前端脈波幅度調變控制之串聯諧振轉換器的設計
論文名稱(外文):Design of a Serial Resonant Converter with Front-End PAM Control
指導教授:黃明熙
口試委員:林法正賴炎生
口試日期:2012-07-27
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電資碩士在職專班研究所
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:2012
畢業學年度:100
語文別:中文
論文頁數:89
中文關鍵詞:功率因數修正串聯諧振轉換器脈波高度調變數位功率控制
外文關鍵詞:Power factor correctionSeries resonant converterPulse amplitude ModulationDigital power control
相關次數:
  • 被引用被引用:6
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  • 下載下載:8
  • 收藏至我的研究室書目清單書目收藏:1
本論文是以具功率因數修正與電氣隔離之交流-直流轉換器的高效率化作為研究目標,所提系統由一單相主動功率因數修正之整流模組及串接一串聯諧振轉換器所建構。所提單相具功率因數修正整流模組之輸出電壓會依據輸入電源之電壓進行調控,其範圍從200V至400V,如此可有效提升該模組於不同電源電壓之效率,此法對提升串聯諧振轉換器之效率亦有助益。而串聯諧振轉換器為LLC架構,是以固定50%責任週期的互補驅動信號來調變半橋功率晶體之切換頻率,使變壓器初級側漏電感、激磁電感、諧振電容及功率元件MOSFET上的寄生元件產生諧振現象,達到一次側開關的零電壓及二次側開關的零電流切換來降低元件的切換損失,如此可有效提高系統效率;最後於變壓器二次側加入同步整流使系統之效率進一步提升。
所提之轉換器是以一只數位訊號處理器做為控制核心同時驅動所有功率晶體,並建構具110V輸入與400W/12V輸出轉換器作為載具,驗證所提控制策略之有效性。實測結果,當直流鏈電壓由400V降壓至350V,在不同負載條件下交流-直流轉換器效率可提高約2.55%~5.06%,而串聯諧振轉換器之效率約可提高2.0%~6.3%,結果符合預期。


The object of this thesis is to design a high efficiency AC-DC converter with power factor correction and electrical isolated DC-DC converter. The proposed converter consists of two stages, including a single phase AC-DC rectifier with power factor correction and a serial resonant converter(SRC) connected in series. The output voltage of the PFC AC-DC converter can be changed from 200V to 400V according to input line voltage, so it can improve efficiency of the converter under different input voltage. Moreover, the efficiency of SRC may also be enhanced. The SRC was constructed from LLC resonant tank which is driven by a half-bridge circuit with fixed 50%-duty carrier frequency. Hence the resonant phenomenon was occurred by both leakage inductance of primary coil and the magnetizing inductance of the transformer, the resonant capacitor and parasitic component of power MOSFETs. The ZVS on primary side power MOSFETs and the ZCS on secondary side power MOSFETs can be achieved to reduce the switching loss, therefore the efficiency of SRC can be yielded. Finally, synchronous rectifier was added in the secondary side of transformer to improve the efficiency further.
The proposed converter with 110V input and 400W/12V output was built and controlled by a DSP. All the power MOSFETs are driven by the DSP. The experimental results, which are successful to meet the expectations, show that the efficiency will be increased about 2.55% to 5.06% for AC-DC converter and about 2.0% to 6.3% for SRC when the DC-link voltage is reduced from 400V to 350V under different loaded conditions.


摘要 i
ABSTRACT ii
誌謝 iv
目錄 v
表目錄 vii
圖目錄 ix
第一章 緒論 1
1.1 研究動機與目的 1
1.2 研究背景 3
1.3 研究方法 6
1.4 論文大綱 7
第二章 單相橋式交流-直流轉換器電路工作原理及分析 8
2.1 前言 8
2.2 單相系統之功率因數定義 8
2.2 單相功率因數修正之電路架構 10
2.3 單相功率因數修正之控制模式 11
2.4 單相交流-直流轉換器系統設計及軟體規劃 14
2.4.1 工作原理 15
2.4.2 硬體設計 18
2.5 軟體控制架構 22
2.5.1 控制架構 23
2.5.2 單相交流-直流轉換器軟體流程圖 24
第三章 串聯諧振轉換器電路工作原理及分析 26
3.1 前言 26
3.2 RLC串聯諧振電路 26
3.3 半橋串聯諧振轉換器之電路分析 28
3.4 半橋串聯諧振轉換器電路動作原理 30
3.5 SRC同步整流及達到ZVS之條件 38
3.6 SRC輕載輸出電壓調控 41
3.7 半橋串聯諧振轉換器之設計 43
3.7.1 功率電晶體之選擇 44
3.7.2 SRC諧振槽元件設計步驟 46
3.7.3 變壓器設計 48
3.7.4 輸出電容設計 51
3.7.5 SRC之數位控制 51
3.7.6 DSP類比數位轉換器之保護電路 53
3.7.7 電壓回授硬體電路 54
第四章 實驗結果與討論 55
4.1 前言 55
4.2 實驗設備 55
4.3 PFC交流-直流轉換器之測試 56
4.3.1 輕載效率不高之分析 61
4.3.2 電流迴路頻寬量測 65
4.4 SRC諧振轉換器之測試 65
第五章 結論與未來展望 77
5.1 結論 77
5.2 未來展望 78
參考文獻 79
符號彙編 84


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