本文選題：功率因數(shù)校正　切入點：Boost變換器　出處：《重慶大學》2014年碩士論文

【摘要】：隨著電力電子技術的發(fā)展，AC-DC功率變換器廣泛應用于計算機電源、通信電源、節(jié)能燈、LED照明系統(tǒng)、家用電器、電動機驅動變頻器、不間斷電源、工業(yè)電源等場合，由此產生的諧波污染和低功率因數(shù)問題也日趨嚴重。功率因數(shù)校正(Power-Factor-Correction，PFC)正是解決這一問題的一種有效方法。隨著功率等級的不斷提高，傳統(tǒng)單相Boost PFC受功率器件的選型、成本、體積、整機效率等因素的限制，無法滿足較大功率場合的應用。將交錯并聯(lián)技術引入到Boost PFC中，能夠有效地降低輸入電流紋波，減少開關管的電流應力，提高功率變換器的功率密度和效率，適合在較大功率場合應用。本文針對交錯并聯(lián)Boost PFC進行了具體的研究。 本文首先介紹了功率因數(shù)校正技術的研究背景，闡述了功率因數(shù)校正技術的分類、拓撲結構和發(fā)展趨勢。然后詳細分析了電感電流連續(xù)模式下交錯并聯(lián)BoostPFC的工作原理和電路特性，對PFC電路的控制策略進行了比較。 基于應用場合的限制以及平均電流控制的優(yōu)點，采用了雙閉環(huán)控制方法，詳細介紹了其工作原理，，并基于電感電流合成技術搭建了仿真電路。仿真結果表明：交錯并聯(lián)Boost PFC有效降低了輸入電流紋波，提高了功率因數(shù)，驗證了電感電流合成的可行性。 最后基于TI公司生產的UCC28070控制芯片，詳細設計了實驗主電路和控制電路的參數(shù)，搭建了交錯Boost PFC實驗電路。采取了分步調試的策略，獲得了反映變換器工作情況的典型波形。實驗結果表明交錯并聯(lián)電路具有很好的電流紋波抑制和高功率因數(shù)校正效果，驗證了理論分析的正確性。
[Abstract]:With the development of power electronics technology, AC-DC power converters are widely used in computer power supply, communication power supply, energy saving lamp LED lighting system, household appliances, motor drive inverter, uninterruptible power supply, industrial power supply and so on. The problems of harmonic pollution and low power factor are becoming more and more serious. Power factor correction power factor correction (PFC) is an effective method to solve this problem. With the increasing of power level, the traditional single-phase Boost PFC is subjected to the selection and cost of power devices. Because of the limitation of the volume and the efficiency of the whole machine, it can not meet the application of the large power situation. Introducing the staggered parallel technology into Boost PFC can effectively reduce the ripple of input current and reduce the current stress of the switch tube. In order to improve the power density and efficiency of the converter, it is suitable for large power applications. In this paper, the interleaving parallel Boost PFC is studied in detail. This paper first introduces the research background of power factor correction technology, and expounds the classification of power factor correction technology. Then, the working principle and circuit characteristics of the interleaving parallel BoostPFC in the inductance current continuous mode are analyzed in detail, and the control strategies of the PFC circuit are compared. Based on the limitation of application and the advantages of average current control, the double closed loop control method is adopted, and its working principle is introduced in detail. The simulation circuit based on inductance current synthesis technology is built. The simulation results show that the interleaving parallel Boost PFC can effectively reduce the input current ripple, improve the power factor, and verify the feasibility of inductance current synthesis. Finally, based on the UCC28070 control chip produced by TI Company, the parameters of the main circuit and the control circuit are designed in detail, and the staggered Boost PFC experimental circuit is built. The experimental results show that the interleaving parallel circuit has good current ripple suppression and high power factor correction effect, which verifies the correctness of the theoretical analysis.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46

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