5KW全數(shù)字控制單級隔離型功率因數(shù)校正變換器的研究
作者：杭麗君 陽岳豐 呂征宇 錢照明 上傳時間：2009/4/29 14:46:49
摘要：針對當前工業(yè)界某些應(yīng)用場合對高功率等級、嚴格的諧波標準以及輸入輸出隔離等要求，本文提出了一種新的結(jié)合主電路拓撲和全數(shù)字控制技術(shù)的解決方案。文章采用單級隔離型全橋結(jié)構(gòu)結(jié)合傳統(tǒng)BOOST型PFC的輸入電感和RCD鉗位作為主電路，并融合數(shù)字控制方案，對中大功率單級隔離型PFC進行研究。分析了主電路工作原理，建立了小信號動態(tài)模型，并詳細分析了基于該模型的數(shù)字控制設(shè)計方法。提供輸入輸出電氣隔離的變壓器，允許輸出可以在較大范圍內(nèi)調(diào)整，既可以高于輸出電壓也可以低于輸出電壓，此外允許多路輸出方案。因此，變壓器的加入大大拓展了此類PFC變換器的使用場合。采用的數(shù)字控制方案，同時具有良好的動態(tài)響應(yīng)特性和穩(wěn)態(tài)調(diào)節(jié)特性。優(yōu)異的動態(tài)調(diào)節(jié)特性可成功解決模擬控制引入的變壓器偏磁現(xiàn)象。基于本文所提出的拓撲以及控制方案，制作了5kW輸出功率且開關(guān)頻率為55kHz的樣機，驗證了該變換器的優(yōu)良性能，滿載功率因數(shù)達到0.994，效率超過92%。
敘詞：單級隔離 全橋 功率因數(shù)校正 偏磁 數(shù)字控制
Abstract：Dedicated to industry requirement of high power level, rigorous harmonic standard and isolation between input and output, a novel solution that combines the main topology and fully digital control strategy is presented in this paper. This paper deals with a power factor correction (PFC) converter based on the topology of isolated of BOOST type PFC and RCD clamping circuit, which features that clamping capacitor can partly return stored energy and that contributes to increase efficiency, furthermore fully digital and its digital control design consideration based on the small-signal dynamic mathematical model of the very converter are respectively specified in this paper. A transformer being used to provide PFC converter. The adopted digital control strategy features fast dynamic response and excellent steady regulation characteristic. Problem of magnetic bias for the transformer that occurs in application of analogy control is successfully solved for excellent performance of digital controller. The above excellent performances of the converter are verified by an experimental prototype, whose output power is 5KW and PFC operation frequency is 55K. Furthermore, such specifications as PF value and efficiency are respective 0.994 and more than 92%.
Keyword：Single-stage isolated, full-bridge, power factor correction, magnetic bias, digital control
說明：本站會員正確輸入用戶名和密碼進行登錄系統(tǒng)后才能查看文章詳細內(nèi)容和參與評論。
－－本文摘自《電源世界》，已被閱讀2229次
免責聲明：本文僅代表作者個人觀點，與電源在線網(wǎng)無關(guān)。其原創(chuàng)性以及文中陳述文字和內(nèi)容未經(jīng)本站證實，對本文以及其中全部或者部分內(nèi)容、文字的真實性、完整性、及時性本站不作任何保證或承諾，請讀者僅作參考，并請自行核實相關(guān)內(nèi)容。
：0755-82905460 郵箱 
：關(guān)于本文的網(wǎng)友評論：
本文暫時還沒有網(wǎng)友發(fā)表評論信息！
文章檢索