LLC諧振變換器開關損耗特性研究
[Abstract]:The high frequency of power switch can greatly reduce the volume of capacitance, inductance and transformer, which not only reduces the cost of electronic components, but also increases the power density of converter. However, if the frequency of the power switch is simply increased, the switching loss of the switch will increase significantly, resulting in a decrease in the efficiency of the converter. At the same time, the rectifier diode will have a serious reverse recovery problem when it works at high frequency, which will not only bring serious EMIs, increase the design difficulty, but also further reduce the efficiency of the converter. The traditional PWM converter is difficult to meet the requirements of high frequency and high efficiency due to the limitation of power off and switching loss. Under this background, the LLC resonant converter emerges as the times require. The LLC resonant converter can not only realize the soft switching of switches and diodes in the full load range, but also achieve high magnetic integration, with high efficiency, high power density and low EMI noise. The wide voltage input range has been widely used in medium and small power electronic products. LLC resonant converters and phase-shifted full-bridge converters have been widely used in the market of different power levels. The merits and demerits of the two have been deeply studied in domestic and foreign literature, but few literatures have compared and analyzed their switching losses. Because the LLC resonant converter is a PFM operation mode and has many key parameters, the control mode is complex and the parameters are difficult to select. Resonance current overload protection and so on. The main work of this paper is as follows: firstly, the design scheme of LLC soft switching distributed power supply system is given, and the principle of EMI filter and SABER simulation model based on UC3854 are introduced. In this paper, the steady-state modeling of half-bridge LLC resonant converter is analyzed, and the characteristic curve of voltage gain is drawn by ORIGIN. On the basis of this, the influence of key parameters on voltage gain is analyzed. Secondly, the equivalent circuit model of LLC resonant converter is established, and the small signal model is built by using the extended description function method. The mathematical model of voltage gain of the converter is obtained, which verifies the correctness of the FHA modeling method. Thirdly, the mathematical model of switching loss of LLC resonant converter is established. According to the requirements of the project, the design flow of the core parameters of the converter based on MATHCAD and the selection process of switch tube and diode are given, and the power calculation of switching loss is completed. Based on SABER simulation, the switching losses of full-bridge PWM ZVS converters and half-bridge LLC resonant converters at the same input, output and switching frequencies are compared. Finally, based on the SABER simulation, the comparison between the basic and the improved LLC resonant converter is carried out, which verifies the improved resonant current overload protection capability, and makes a small signal time domain simulation of the improved one. The baud diagram of the input frequency changing to the output voltage is obtained, and the closed-loop compensation controller is designed based on the Porter diagram analysis. The results show that the LLC resonant converter can output stably under different load conditions.
【學位授予單位】:東華大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:TM46
【相似文獻】
相關期刊論文 前10條
1 朱建華,羅方林;功率諧振變換器及其發(fā)展方向[J];電工電能新技術;2004年01期
2 張春林;嚴萍;;移相式并聯(lián)諧振變換器的分析與仿真[J];電力電子技術;2007年03期
3 張衛(wèi)平;毛鵬;肖實生;;串聯(lián)諧振變換器的穩(wěn)態(tài)模型[J];電源世界;2008年10期
4 賀明智;劉宏亮;王丹;馮軻;;串聯(lián)負載諧振變換器的參數(shù)設計[J];大功率變流技術;2009年03期
5 李建兵;張國棟;鄢登高;;容性濾波并聯(lián)諧振變換器及其優(yōu)化設計[J];信息工程大學學報;2011年02期
6 章治國;余海生;;一種雙有源橋諧振變換器的研究與設計[J];微電子學;2012年03期
7 湯曉晨;周潔敏;穆建國;;一種基于數(shù)字控制的諧振變換器設計[J];電力電子技術;2012年05期
8 彭詠龍;李亞斌;朱輝;;基于非整周期模式串聯(lián)諧振變換器控制技術[J];電力科學與工程;2012年10期
9 蔡宣三,原田耕介;電力電子電源諧振變換器的幾個問題[J];電工技術雜志;1989年02期
10 林波濤,林綱,,丘水生;一類新的準諧振變換器[J];華南理工大學學報(自然科學版);1995年08期
相關會議論文 前9條
1 趙紅茹;吳捷;;準諧振變換器的建模與性能分析[A];第二十一屆中國控制會議論文集[C];2002年
2 謝帆;張波;丘東元;;基于松散耦合變壓器的全橋諧振變換器非線性行為分析[A];第七屆中國高校電力電子與電力傳動學術年會論文集[C];2013年
3 唐春森;沈昊;;準諧振變換器的雙閉環(huán)控制方法及實現(xiàn)[A];2013年中國電機工程學會年會論文集[C];2013年
4 陳祥;夏冰;;高壓大功率場合LCC諧振變換器的分析與設計[A];第十二屆中國電除塵學術會議論文集[C];2007年
5 吳扣林;陳乾宏;金科;阮新波;;磁集成復合式全橋三電平LLC諧振變換器[A];2008中國電工技術學會電力電子學會第十一屆學術年會論文摘要集[C];2008年
6 黃靖;;SIMULINK4環(huán)境下零電流串聯(lián)諧振變換器仿真[A];第十六屆電工理論學術年會論文集[C];2004年
7 楊帆;楊柏祿;陳永真;孟麗囡;;帶有智能同步整流方案的LLC諧振變換器設計[A];2008中國電工技術學會電力電子學會第十一屆學術年會論文摘要集[C];2008年
8 馬珊珊;任國海;;基于LLC諧振轉換器的高效LED燈驅動電源[A];2012(杭州)中國長三角照明科技論壇論文集[C];2012年
9 盛洪剛;謝運祥;;基于MATLAB的對零電流開關(ZCS)準諧振變換器(QRC)的建模與仿真[A];中國電工技術學會電力電子學會第八屆學術年會論文集[C];2002年
相關重要報紙文章 前1條
1 成都 溫成宜編譯;LLC串聯(lián)諧振變換器FSFR2100[N];電子報;2008年
相關博士學位論文 前4條
1 張治國;具有電容輸出濾波器諧振變換器的研究[D];華南理工大學;2012年
2 李金剛;電壓型負載諧振變換器諧振槽路參數(shù)優(yōu)化設計與負載匹配的研究[D];西安理工大學;2007年
3 楊瑞;LCC諧振變換器的解析建模與分析[D];華中科技大學;2014年
4 鄧成;柔性多層帶材電磁元件集成方法及應用[D];浙江大學;2014年
相關碩士學位論文 前10條
1 潘鋼;數(shù)字式LLC諧振變換器及并聯(lián)均流技術的研究[D];西南交通大學;2015年
2 王曉昱;光伏系統(tǒng)中LLC諧振變換器的研究[D];西南交通大學;2015年
3 付歟翔;基于LLC諧振的無工頻牽引變壓器的交直變換系統(tǒng)研究[D];西南交通大學;2015年
4 吳建雪;CLL諧振變換器的分析與設計[D];西南交通大學;2015年
5 夏炎;三相LLC諧振變換器的研究[D];西南交通大學;2015年
6 萬玉超;LLC諧振變換器在電動汽車充電機中的應用研究[D];山東大學;2015年
7 魏峗豪;LLC諧振式充電機研究及數(shù)字化實現(xiàn)[D];山東大學;2015年
8 趙舒博;交錯并聯(lián)LLC諧振變換器的研究[D];哈爾濱工業(yè)大學;2015年
9 孫繼鑫;基于LLC諧振的雙向AC/DC變換器設計[D];哈爾濱工業(yè)大學;2015年
10 閆大鵬;1.5kW半橋LLC諧振DC/DC變換器的研究[D];哈爾濱工業(yè)大學;2015年
本文編號:2174050
本文鏈接:http://sikaile.net/kejilunwen/dianlidianqilunwen/2174050.html