單相升壓型APFC電路的研究

電氣工程論文編號:DQ180   論文字數:23143,頁數:49

目 錄

1  緒論…………………………………………………………...............1
 1.1 功率因數校正(PFC)問題的提出...…………………………………………..1
 1.2 功率因數（PF）的基本概念………………………………………………….2
 1.3 PFC的發展和國內外科研動態………………………………………………..4
 1.4 本文研究的主要內容…………………………………………………….......5
2  功率因數校正技術………………………………………………...........6
 2.1 無源功率因數校正……………………………………………………............6
 2.2 有源功率因數校正……………………………………………………………6
   2.2.1有源功率因數校正的基本原理……………………………………………6
   2.2.2  APFC的主電路拓撲……………………………………………………..7
   2.2.3  APFC的控制方法………………………………………………………..8
 2.3  PFC電路的性能比較…………………………………………………………10
3  Boost型 APFC電路結構………………………………………………...13
 3.1  BOOST拓撲分析……………………………………………………………….13
 3.2  在CCM控制方式下工作模式的分析……………………………………………14
 3.3  CCM狀態下的電流正弦化……………………………………………………...15
 3.4  Boost AFPC整體電路的結構框圖……………………………………………...16
4  250W APFC電路設計……………………………………………………..18
 4.1  主電路設計 18
  4.1.1 升壓電感的設計……………………………………………………………..18
 4.1.2 輸出電容的選擇……………………………………………………………..20
 4.1.3 功率器件的選擇……………………………………………………………..21
 4.2  控制電路設計………………………………………………………..23
 4.2.1  UC3854簡介………………………………………………………………..23
 4.2.2  乘法器的設置………………………………………………………………26
 4.2.3  振蕩頻率的確定…………………………………………………………….28
 4.2.4  峰值電流限制………………………………………………………………28
 4.2.5  驅動電路的設計…………………………………………………………….29
 4.2.6  反饋補償網絡的初步設計…………………………………………………...29
 4.3  試驗結果及分析………………………………………………………………...30
5  結論…………………………………………………………...................32
致謝…………………………………………………………………………33
參考文獻…………………………………………………………………….34
附錄A( 250W樣機電路原理圖)………………………………………………………36

摘 要

 近年來，電力電子裝置在軍事、工業、農業、生活及高新技術領域的應用日趨廣泛，電力電子技術已成為工程技術領域的關鍵技術之一。然而電力電子產品的廣泛應用，對電網造成了嚴重的諧波污染,功率因數校正技術（Power Factor Correction）是電力電子產品滿足綠色環保要求的必需手段，是未來開關電源發展的關鍵技術之一。
    本文對Boost型APFC電路的功率因數校正技術進行了分析和研究。首先，主要介紹了功率因數（PF）的基本概念和PFC的發展和國內外科研動態,并說明了本文研究的主要內容。其次簡單地介紹了無源功率因數校正技術,詳細地說明了有源功率因數校正技術的基本工作原理, APFC的主電路拓樸及其控制方式和PFC電路的性能比較。接著，進行BOOST拓撲分析,講述了在CCM控制方式下工作模式,設計了Boost AFPC整體電路的結構框圖。再接著，給出了給出了主電路參數的計算過程及結果,主要包括升壓電感、輸出電容和功率器件。然后就著，先介紹APFC控制常用的專用集成芯片UC3854的內部結構及其工作原理,再是給出了控制電路參數的計算過程及結果,包括乘法器的設置、振蕩頻率的確定、峰值電流限制、驅動電路的設計和反饋補償網絡的初步設計。最后,第六章為全文小結，總結了本文的研究內容,并提出了進一步工作的設想。

關鍵詞 諧波,有源功率因數校正，Boost變換器，電感電流連續模式,UC3854

Abstract

 In recent years, Power electronic devices are wildly used in the military, industry, agriculture, life and high-tech applications, and power electronics has become one of the key technologies in the field of engineering. But due to wide applications of the electronic products, serious harmonic waves are produced. Now power factor correction has become one of necessary means which can satisfy the requirements of environmental protection. It is one of the key technologies in the future development of switching.
 In this paper, Boost circuit for APFC had been analyzed in detail. First, the paper is the Introduction of this paper and mainly introduces the basic concept of PFC, the development of Power Factor, scientific research at home and abroad and the main content of this paper.  Second, it briefly introduces the passive power factor correction, then it describes the fundamental principle of the APFC in detail, the control methods, the main circuit topology of APFC, and compares the performance of PFC circuit. Third, it analyzes BOOST topology, describes in the control work patterns of CCM, then designs the overall structure of the Boost AFPC circuit. Fourth, it presents the calculated process of the main circuit’s parameters and results, which mainly includes boost inductor, the output capacitor and power devices. Fifth, it explains the interior structure and working principles of the integrated chip-UC3854 which is commonly used in APFC control, then presents the calculated process of the controlled circuit’s parameters and results, which mainly includes the multiplier’s settings, the oscillation frequency identification, the peak current limit, the design of dynamic circuit and feedback the preliminary design of the compensation network. Finally, Chapter 6 summarizes the full text, sums up the contents of this paper, and puts forward the idea of further work.                 
 
Key words Harmonic, Active Power Factor Correction（APFC）, Boost Converter, CCM,
 UC3854