本文選題：LED驅(qū)動電源 + 高功率因數(shù)�。� 參考：《江蘇大學(xué)》2017年碩士論文

【摘要】：發(fā)光二極管(Lighting Emitting Diode,LED),具有亮度高,功率低,使用壽命長等優(yōu)點。LED照明的發(fā)展依賴于LED驅(qū)動電源技術(shù)的成熟與進步。功率因數(shù)和輸出紋波是衡量LED驅(qū)動電源性能好壞的重要指標(biāo)。為了提高功率因數(shù)和降低輸出紋波,本文對級聯(lián)式LED驅(qū)動電源做了一些研究。首先介紹了LED驅(qū)動電源的研究背景及意義,闡述了LED的發(fā)光原理與特性。根據(jù)國內(nèi)外參考文獻,分別歸納分析了高功率因數(shù)和低輸出紋波LED驅(qū)動電源的研究現(xiàn)狀。深入研究了級聯(lián)式LED驅(qū)動電源,以基于二次型Buck變換器的LED驅(qū)動電源為例,詳細分析了主電路的工作模態(tài)與工作特性,對主電路參數(shù)進行了優(yōu)化設(shè)計。通過PSIM仿真驗證了理論分析的正確性。其次,提出了一種新型基于二次型Buck變換器的交錯并聯(lián)LED驅(qū)動電源,利用交錯并聯(lián)技術(shù),優(yōu)化了原有二次型Buck變換器的拓撲結(jié)構(gòu),降低了開關(guān)器件的電壓電流應(yīng)力,減小了輸出紋波。在不同開關(guān)占空比的條件下,分析了主電路的工作模態(tài)。詳細分析了主電路的工作特性,為主電路參數(shù)設(shè)計提供了依據(jù)。通過PSIM對理論分析進行了仿真驗證。然后,針對基于二次型Buck變換器的交錯并聯(lián)LED驅(qū)動電源存在輸入電流過零死區(qū)的問題,提出了一種新型基于Buck-boost級聯(lián)二次型Buck的交錯并聯(lián)LED驅(qū)動電源。通過共用一個開關(guān)管,在原有拓撲結(jié)構(gòu)的基礎(chǔ)上級聯(lián)了一個Buck-boost電路。詳細分析了主電路的工作模態(tài)、中間儲能電容電壓特性、電感工作在電流斷續(xù)模式的條件和開關(guān)頻率特性。利用Buck-boost電路的特性,基本解決了輸入電流過零死區(qū)的問題,改善了輸入電流總諧波畸變率,使功率因數(shù)近似為1。最后,針對所提出的基于Buck-boost級聯(lián)二次型Buck的交錯并聯(lián)LED驅(qū)動電源設(shè)計制作了實驗樣機。為了主電路開關(guān)器件的選型,分析計算了主電路開關(guān)器件的最大電壓電流應(yīng)力。詳細設(shè)計了控制電路及驅(qū)動隔離電路。通過實驗,得出的結(jié)果與理論分析基本一致,再次證明了理論分析的正確性。
[Abstract]:Light emitting Diode (LED) has the advantages of high brightness, low power and long service life. The development of LED lighting depends on the maturity and progress of LED driving power technology. Power factor and output ripple are important indexes to measure the performance of LED drive power supply. In order to improve the power factor and reduce the output ripple, the cascade LED drive power supply is studied in this paper. Firstly, the research background and significance of LED driving power are introduced, and the principle and characteristics of LED are expounded. According to the references at home and abroad, the research status of high power factor and low output ripple LED driver is summarized and analyzed respectively. The cascade LED driving power supply is deeply studied. Taking the LED drive power supply based on the quadratic Buck converter as an example, the working modes and working characteristics of the main circuit are analyzed in detail, and the main circuit parameters are optimized. The theoretical analysis is verified by PSIM simulation. Secondly, a novel interleaving parallel LED driving power supply based on secondary Buck converter is proposed. The topology of the original secondary Buck converter is optimized by using the staggered parallel technology, and the voltage and current stress of the switching device is reduced. The output ripple is reduced. The operating modes of the main circuit are analyzed under different duty cycle conditions. The working characteristics of the main circuit are analyzed in detail, and the design basis of the main circuit parameters is provided. The theoretical analysis is verified by PSIM. Then, a novel Buck-boost cascaded parallel LED driver based on Buck-boost cascade is proposed to solve the problem of zero-crossing dead time of input current in the interleaved parallel LED driving power supply based on quadratic Buck converter. By sharing one switch, a Buck-boost circuit is cascaded on the basis of the original topology. The operating mode of the main circuit, the voltage characteristics of the intermediate energy storage capacitor, the condition of the inductor working in the current intermittent mode and the switching frequency characteristics are analyzed in detail. By using the characteristics of Buck-boost circuit, the problem of zero crossing dead time of input current is basically solved, the total harmonic distortion rate of input current is improved, and the power factor is approximately 1. Finally, an experimental prototype is developed for the design of an interleaved parallel LED driver based on Buck-boost cascade secondary Buck. In order to select the switch devices of the main circuit, the maximum voltage and current stress of the switch devices of the main circuit is analyzed and calculated. Control circuit and drive isolation circuit are designed in detail. The experimental results are basically consistent with the theoretical analysis, and the correctness of the theoretical analysis is proved again.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM46

【參考文獻】

相關(guān)期刊論文 前10條

1 張藝文;金科;;一種單級式高功率因數(shù)無電解電容AC/DC LED驅(qū)動電源略[J];中國電機工程學(xué)報;2015年22期

2 付賢松;郭娜娜;李洪超;王婷;李圓圓;任賀宇;;基于IW3623高功率因數(shù)LED驅(qū)動電源設(shè)計[J];電工技術(shù)學(xué)報;2015年S1期

3 閻鐵生;許建平;曹太強;劉雪山;高旭;周國華;;基于二次型Buck PFC變換器的無頻閃無變壓器LED驅(qū)動電源[J];電工技術(shù)學(xué)報;2015年12期

4 陳利;許建平;曾怡達;閻鐵生;;基于反激變換器的無頻閃LED驅(qū)動電源[J];電力電子技術(shù);2015年06期

5 武杰;王春芳;劉茂盛;;兩級式高功率因數(shù)LED照明驅(qū)動電源的研究[J];電工電能新技術(shù);2014年08期

6 廖志凌;王生東;錢鞠;;PFM控制交錯并聯(lián)反激LED驅(qū)動電源研究[J];電測與儀表;2014年08期

7 陸治國;田海濤;汪淵;;一種新型的交錯并聯(lián)二次型Buck變換器[J];電力電子技術(shù);2014年02期

8 王楠;許建平;劉雪山;;一種高功率因數(shù)低輸出紋波LED驅(qū)動器[J];電力電子技術(shù);2013年11期

9 陸治國;祝萬平;劉捷豐;吳春軍;趙麗麗;;一種新型交錯并聯(lián)雙向DC/DC變換器[J];中國電機工程學(xué)報;2013年12期

10 林方盛;蔣曉波;江磊;劉木清;;LED驅(qū)動電源綜述[J];照明工程學(xué)報;2012年S1期

相關(guān)博士學(xué)位論文 前1條

1 沈海平;大功率LED可靠性預(yù)測機制研究[D];浙江大學(xué);2008年

相關(guān)碩士學(xué)位論文 前4條

1 江凱文;無電解電容LED驅(qū)動電源研究[D];江蘇大學(xué);2016年

2 高旭;高功率因數(shù)原邊反饋反激LED驅(qū)動電源研究[D];西南交通大學(xué);2015年

3 韓少韋;LED驅(qū)動電源的研究與設(shè)計[D];東華大學(xué);2014年

4 王蓓蓓;無電解電容的高亮度LED驅(qū)動電源研究[D];南京航空航天大學(xué);2009年

，

本文編號：2111608