DCM Boost PFC變換器變占空比控制的數(shù)字實現(xiàn)方法
宋俊超
（南京理工大學(xué) 自動化學(xué)院，江蘇 南京 210094）
摘 要：分析了變占空比控制的基本原理，推導(dǎo)出該控制算法的占空比表達式，并提出了一種具有恒功率功能的變占空比控制的數(shù)字實現(xiàn)方法?；跀?shù)字信號處理器MC56F8257對80 W DCM Boost PFC變換器進行了實驗驗證。實驗結(jié)果表明，數(shù)字變占空比控制可以在較寬的輸入電壓范圍內(nèi)實現(xiàn)接近于1 的功率因數(shù)，輸入電流基本無畸變。
關(guān)鍵詞：功率因數(shù)校正(PFC)；斷續(xù)模式(DCM)；變占空比控制；數(shù)字實現(xiàn)
中圖分類號：TM46 文獻標識碼：A 文章編號：1007-3175(2017)04-0031-04
Digital Realization Method of Variable Duty Ratio Control for Discontinuous
Current Mode Boost Power Factor Correction Converters
SONG Jun-chao
（School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China）
Abstract: This paper analyzed the basic principle of variable duty ratio control, derived the expression of duty ratio of this control algorithm and proposed a kind of variable duty ratio control digital implementation method with constant power functions. The experimental verification of discontinuous current mode (DCM) Boost power factor correction (PFC) 80 W converter was carried out based on the digital signal processor MC56F8257. The experimental results show that the digital variable duty ratio control can achieve a power factor close to 1 in a wide range of input voltages and the input current is almost no distortion.
Key words: power factor correction; discontinuous current mode; variable duty ratio control; digital realization
參考文獻
[1] YE Z Z, JOVANOVIC M M.Implementation and performance evaluation of DSP-based control for constant-frequency discontinuous-conduction-mode boost PFC front end[J].IEEE Transactions on Industrial Electronics，2005，52(1)：98-107.
[2] 葉開明，陳浩龍，蔡逢煌，王武.DCM Boost PFC 數(shù)字化的研究[J]. 電氣自動化，2014，36(4)：47-49.
[3] CHEN F Z, MAKSIMOVIC D.Digital control for improved efficiency and reduced harmonic distortion over wide load range in boost PFC rectifiers[J].IEEE Transactions on Power Electronics，2009，25(10)：760-766.
[4] ATHAB H S.A duty cycle control technique for elimination of line current harmonics in single-stage DCM boost PFC circuit[C]//IEEE Region 10 Conference，2008，18(5)：1-6.
[5] 楊靖，陳新. 電感電流斷續(xù)模式下的功率因數(shù)校正數(shù)字控制解決方案[J]. 通信電源技術(shù)，2007，24(1)：8-10.
[6] 姚凱，阮新波，冒小晶，葉志紅. 電流斷續(xù)模式Boost 功率因數(shù)校正變換器的變占空比控制[J]. 電工技術(shù)學(xué)報，2011，26(11)：14-24.
