【摘要】：近年隨著開(kāi)關(guān)電源的發(fā)展,軟開(kāi)關(guān)技術(shù)在各類電源應(yīng)用中已經(jīng)非常普遍,很多高效率的拓?fù)湮覀兌伎梢赃x擇,主要為諧振型的軟開(kāi)關(guān)拓?fù)浜蚉WM型的軟開(kāi)關(guān)拓?fù)洹ｋS著半導(dǎo)體器件的飛速發(fā)展,開(kāi)關(guān)管的各項(xiàng)參數(shù)越來(lái)越好,尤其是導(dǎo)通電阻、寄生電容和反向恢復(fù)時(shí)間越來(lái)越小的情況下,為L(zhǎng)LC諧振拓?fù)浒l(fā)展提供了一個(gè)很好的平臺(tái),諧振變換器可以實(shí)現(xiàn)軟開(kāi)關(guān)變換,可以把整機(jī)效率提高一個(gè)層面。LLC型諧振電路具有許多優(yōu)點(diǎn)。首先,可以在輸入和負(fù)載大范圍變化的情況下調(diào)節(jié)輸出,開(kāi)關(guān)頻率變化很小。第二,整個(gè)工作中,實(shí)現(xiàn)零電壓切換(ZVS)�！ぷ詈�,所有寄生元件、半導(dǎo)體器件的結(jié)電容和變壓器的漏磁電感和激磁電感都可以實(shí)現(xiàn)ZVS切換。本文首先對(duì)LED光源近年發(fā)展趨勢(shì)進(jìn)行了簡(jiǎn)單的分析,對(duì)LED路燈需求進(jìn)行了闡述,分析了以LLC半橋諧振電路為核心的LED路燈電源的優(yōu)缺點(diǎn)和電路拓?fù)溥x擇。以144W路燈電源為設(shè)計(jì)目標(biāo),設(shè)計(jì)指標(biāo)輸出電壓為48V,輸出電流為3A的LED路燈電源,對(duì)整個(gè)電源系統(tǒng)進(jìn)行了各環(huán)節(jié)的測(cè)試及整機(jī)優(yōu)化,驗(yàn)證了電路方案的可行性。本文第一部分介紹了論文成立此課題的前景及論文構(gòu)架。第二部分介紹了目前LED市場(chǎng)的發(fā)展,對(duì)LED發(fā)展趨勢(shì)進(jìn)行了展望,并闡述了LLC諧振電路在LED路燈中的關(guān)鍵地位。第三部分介紹了LLC半橋諧振電路的拓?fù)漕愋秃突驹?介紹了LLC電路各種拓?fù)涞膬?yōu)缺點(diǎn),并對(duì)各個(gè)時(shí)間周期的工作特性和原理進(jìn)行逐一闡述和分析。第四部是分簡(jiǎn)化LLC電路,分析LLC諧振電路頻域直流特性。第五部簡(jiǎn)單介紹了LLC拓?fù)涓鳝h(huán)節(jié)的優(yōu)化方案和關(guān)鍵元件選擇。第六部分是按照設(shè)計(jì)要求,設(shè)計(jì)一款144W路燈電源,包括PFC電路設(shè)計(jì)部分和LLC半橋諧振電路部分,并對(duì)設(shè)計(jì)各環(huán)節(jié)進(jìn)行說(shuō)明。第七部分對(duì)整個(gè)電源系統(tǒng)進(jìn)行了系統(tǒng)的測(cè)試。第八部分電源整機(jī)系統(tǒng)各模塊損耗分析。第九部分總結(jié)了測(cè)試中發(fā)現(xiàn)的問(wèn)題并加以解決�？梢钥闯�,144W半橋諧振電路效率優(yōu)勢(shì)明顯,并在待機(jī)功耗等其他方面表現(xiàn)優(yōu)良。
[Abstract]:In recent years, with the development of switching power supply, soft switching technology has been widely used in all kinds of power supply applications. We can choose a lot of high efficiency topologies, mainly resonant soft switching topology and PWM soft switching topology. With the rapid development of semiconductor devices, the parameters of switch become better and better, especially the on-resistance, parasitic capacitance and reverse recovery time are getting smaller and smaller, which provides a good platform for the development of LLC resonant topology. The resonant converter can realize the soft switching transformation, and can improve the efficiency of the whole machine by one layer. LLC type resonant circuit has many advantages. First, the output can be adjusted in a wide range of inputs and loads, with little change in switching frequency. Secondly the zero-voltage switching (ZVS).) is realized in the whole work. Finally all parasitic elements semiconductor device junction capacitance and transformer leakage inductance and exciting inductance can realize ZVS switching. In this paper, the development trend of LED light source in recent years is simply analyzed, and the requirement of LED street lamp is expounded. The advantages and disadvantages of LED street lamp power supply with LLC half-bridge resonant circuit as the core and the circuit topology selection are analyzed. Taking 144W street lamp power supply as the design target, the design index output voltage is 48V, output current is 3A LED street lamp power supply. The whole power supply system is tested and optimized in every link, and the feasibility of the circuit scheme is verified. The first part of this paper introduces the future and framework of the thesis. In the second part, the development of LED market is introduced, the development trend of LED is prospected, and the key position of LLC resonant circuit in LED street lamp is expounded. The third part introduces the topology types and basic principles of LLC half-bridge resonant circuit, introduces the advantages and disadvantages of various topologies of LLC circuits, and expounds and analyzes the working characteristics and principles of each time cycle one by one. The fourth part is a simplified LLC circuit, the LLC resonant circuit frequency domain DC characteristics. In the fifth part, the optimization scheme and the selection of key components of LLC topology are introduced briefly. The sixth part is to design a 144W street lamp power supply according to the design requirements, including the PFC circuit design part and the LLC half-bridge resonant circuit part, and explain each link of the design. The seventh part has carried on the system test to the entire power supply system. The eighth part is the loss analysis of the whole power supply system. The ninth part summarizes the problems found in the test and solves them. It can be seen that the 144W half-bridge resonant circuit has obvious efficiency advantages and good performance in other aspects such as standby power consumption.
【學(xué)位授予單位】：復(fù)旦大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46;TM923.34

【共引文獻(xiàn)】

相關(guān)期刊論文 前4條

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4 張一超;池超旦;龔雪;張利宏;張洪偉;金立;;基于光纖光譜儀的LED光學(xué)特性測(cè)試[J];實(shí)驗(yàn)室研究與探索;2015年09期

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1 王杰;;新型LED顯示支撐結(jié)構(gòu)材料的技術(shù)應(yīng)用[A];第23屆全國(guó)結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集（第Ⅱ冊(cè)）[C];2014年

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2 李煥青;3D-HEVC視頻編碼技術(shù)研究[D];西安電子科技大學(xué);2014年

3 楊曉林;LED路燈電源中的功率因數(shù)解決方案[D];西安電子科技大學(xué);2014年

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6 程超;高功率因數(shù)準(zhǔn)諧振LED驅(qū)動(dòng)電源設(shè)計(jì)[D];華南理工大學(xué);2014年

7 李震;基于Zigbee技術(shù)的大功率LED路燈監(jiān)控系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)[D];華南理工大學(xué);2014年

8 王莘迪;基于白光LED的室內(nèi)無(wú)線通信的研究[D];蘭州交通大學(xué);2014年

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本文編號(hào)：2192951