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研究生:林保偉
研究生(外文):Pao-Wei Lin
論文名稱:基本電力轉換器功因校正性能分析與隔離式Zeta電力轉換器之模式推導及控制器設計
論文名稱(外文):Power Factor Correction Converters and Modeling and Controller for Isolated Zeta Converters
指導教授:林鐘焎
指導教授(外文):Jong-Lick Lin
學位類別:碩士
校院名稱:國立成功大學
系所名稱:工程科學系碩博士班
學門:工程學門
學類:綜合工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:103
中文關鍵詞:功因校正不連續導通模式
外文關鍵詞:Power Factor CorrectionDCM
相關次數:
  • 被引用被引用:35
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  • 下載下載:225
  • 收藏至我的研究室書目清單書目收藏:0
摘要
功因校正電路主要可分被動式與主動式,被動式使用電感、電容組合成濾波電路,改善輸入電流波形與相角;主動式功因校正係利用電力轉換器加入在整流級與穩壓級中間,以獲得良好功率因數,相較於被動式功因校正,主動式具有體積小、重量輕、效率高等優點。
某些電力轉換器操作在不連續導通模式,天生就具有功因校正能力,無須設計功因校正控制器。本文中,首先探討基本電力轉換器之功因校正能力,利用輸入電壓/平均電流之輸入特性曲線與LFR (Loss-Free Resistor)兩種方法,分別分析基本電力轉換器功因校正能力,由分析可知zeta電力轉換器,在三種操作模式�]1.DCMLm>Lo 2.DCMLm<Lo 3.DCMLm<<Lo,皆具有優良功因校正能力(PF=1)。在不改變電路的動作情形下,為了電氣隔離與開關驅動容易,可將zeta電力轉換器修改成隔離式,並將浮接開關改為接地開關。
吾人針對隔離式zeta電力轉換器操作在DCMLm>Lo模式下,利用線電壓週期 輸入平均電流與輸出平均電流,畫出小訊號等效電路,推導其小訊號數學模式,並使用頻譜分析儀與模擬軟體IsSpice,以驗證模式推導之正確性。最後根據所推導之數學模式來設計古典控制器,由實作結果顯示,加入控制器能抵抗負載變動,達到穩壓的效果,並維持原有的功因校正能力(PF=1)。
Abstract
The power factor correction (PFC) circuits are primarily divided into passive and active types. For the passive type, a filter composed of inductor and capacitor is used to improve the phase lag of the input current. On the other hand, a power converter is added between the rectifier and the voltage regulation stage to achieve a good power factor for the active type. In comparison with the two types of PFC circuits, the active PFC circuit exhibits the advantages of small volume, light weight and high efficiency.
Some power converters, operating in discontinuous conduction mode, has the gift of PFC without any controller. First of all, the PFC capabilities of the basic power converters are discussed in this thesis. Two approaches, including the characteristic curve plotting of input voltage/averaging current and LFR (Loss-Free Resistor), are applied to analyze the PFC capabilities for these basic power converters. Among them, it is worthy to note that the zeta power converter, operating in three modes of DCMLm>Lo, DCMLm<Lo and DCMLm<<Lo, are all verified to have excellent PFC with PF=1. In addition, for the sake of electrical isolation and easily switch driving, the zeta power converter is modified into an isolated mode with a grounded switch without effecting the operation of the converter.
By perturbation of the averaged input/output current under the period of line voltageTL, a small-signal model is derived for the proposed isolated zeta power converter operating in DCMLm>Lo mode. Then the equivalent circuit related to the derived small-signal model can be obtained. In addition, the proposed model is also verified by the measurements of spectral analyser and simulation results of IsSpice. Finally, a PI controller is designed for the derived model. It is shown from the experimental results that the variations of load are insensitive to the closed-loop system, and excellent voltage regulation can also be exhibited. The PFC capability with unity power factor of the converter can still be maintained.
目錄

頁次
中文摘要I
英文摘要II
目錄III
圖表目錄V
第一章 緒論1-1
1-1簡介1-1
1-2功率因數之定義1-2
1-3相關論文回顧1-4
1-4本文結構1-5
第二章 功率因數校正方式2-1
2-1功因校正分類2-1
2-2被動式功因校正方法2-1
2-3主動式功因校正方法2-3
2-3-1 乘法器控制法 2-5
2-3-2 電壓隨耦法2-7
第三章 電力轉換器之功因校正性能比較3-1
3-1基本電力轉換器之功因校正性能3-1
3-2電力轉換器之功因校正能力3-1
3-3不連續導通模式與連續導通模式之定義3-1
3-4降壓型電力轉換器3-2
3-5升壓型電力轉換器3-4
3-6升降壓型電力轉換器3-5
3-7Cuk電力轉換器3-7
3-8sepic電力轉換器3-14
3-9zeta電力轉換器3-14
第四章 LFR分析電力轉換器功因校正性能4-1
4-1降壓型電力轉換器之LFR model4-2
4-2升壓型電力轉換器之LFR model4-3
4-3升降壓型電力轉換器之LFR model4-5
4-4Cuk電力轉換器之LFR model 4-6
4-5sepic電力轉換器之LFR model4-12
4-6zeta電力轉換器之LFR model4-12
4-7模擬波形4-15
第五章 操作於DCMLm>Lo 之隔離式zeta電力轉換器動作分析與模式推導5-1
5-1隔離式高功因電力轉換器5-1
5-2操作於 之隔離式zeta電力轉換器動作分析5-1
5-3電力轉換器數學模式推導5-3
第六章 操作於 之隔離式zeta電力轉換器的元件規格設計與模式驗証6-1
6-1DC-DC 隔離式zeta電力轉換器元件規格設計6-1
6-2AC-DC 隔離式zeta電力轉換器元件規格設計6-5
6-3脈波寬度調變器之小訊號交流等效增益(KPWM)6-10
6-4數學模式之驗證 6-11
6-5直流工作點之驗証6-13
第七章 實作結果與控制器設計7-1
7-1減震電路(snubber)7-1
7-2控制器設計7-2
7-3控制器實作結果分析比較7-7
第八章 結論與未來展望8-1
8-1結論8-1
8-2未來展望8-2
參考文獻
自述
參考文獻
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