【摘要】：反激式變換器最初應(yīng)用在汽車(chē)點(diǎn)火線圈中。今天，反激式開(kāi)關(guān)電源在消費(fèi)電子等領(lǐng)域廣泛應(yīng)用。然而，反激式開(kāi)關(guān)電源具有效率低的特點(diǎn)，如何降低它的工作損耗以提升工作效率，吸引了許多研究人員的注意。 本文詳細(xì)介紹了國(guó)內(nèi)外降低反激式開(kāi)關(guān)電源損耗技術(shù)的研究現(xiàn)狀，深入分析了開(kāi)關(guān)管占空比和輸出整流器占空比對(duì)反激式開(kāi)關(guān)電源中所存在的6種損耗（包括開(kāi)關(guān)管的開(kāi)關(guān)損耗與導(dǎo)通損耗、輸入濾波電容器的損耗、變壓器繞組的損耗、輸出整流器的導(dǎo)通損耗、輸出濾波電容器的損耗）的影響。理論分析得出：（1）當(dāng)開(kāi)關(guān)管占空比增大時(shí)，它的關(guān)斷損耗呈現(xiàn)先減小后增大的規(guī)律，而輸入端的各部分損耗則越來(lái)越小，但減小的速度隨開(kāi)關(guān)管占空比的增大而減��；（2）當(dāng)輸出整流器占空比增大時(shí)，輸出端各部分的損耗和開(kāi)關(guān)管的關(guān)斷損耗將變小，但它們減小的速度也隨著輸出整流器占空比的增大而減小。 本文設(shè)計(jì)了3組實(shí)驗(yàn)進(jìn)行驗(yàn)證：（1）輸出整流器的導(dǎo)通占空比保持不變，只改變開(kāi)關(guān)管占空比；（2）開(kāi)關(guān)管的占空比保持不變，只改變輸出整流器的導(dǎo)通占空比；（3）同時(shí)以固定步長(zhǎng)改變開(kāi)關(guān)管占空比和輸出整流器占空比，該組實(shí)驗(yàn)還通過(guò)搭建電路的方式進(jìn)行了驗(yàn)證。仿真實(shí)驗(yàn)得出結(jié)論：當(dāng)開(kāi)關(guān)管占空比設(shè)定在0.45左右，輸出整流器占空比設(shè)定在0.55左右時(shí)，，反激式開(kāi)關(guān)電源的效率最高。實(shí)驗(yàn)結(jié)果驗(yàn)證了理論分析。
[Abstract]:Flyback converters were initially used in automobile ignition coils. Today, flyback switching power supply is widely used in consumer electronics and other fields. However, flyback switching power supply has the characteristics of low efficiency. How to reduce its working loss to improve its efficiency has attracted the attention of many researchers. In this paper, the research status of reducing the loss of flyback switching power supply at home and abroad is introduced in detail. Six kinds of losses (including switching loss and conduction loss of switch tube, loss of input filter capacitor, loss of transformer winding) existing in switch duty cycle and duty ratio of output rectifier in flyback switching power supply are analyzed in depth. The effect of on loss of output rectifier and loss of output filter capacitor. The theoretical analysis shows that: (1) when the duty cycle of the switch tube increases, the turn-off loss decreases first and then increases, while the loss of each part of the input becomes smaller and smaller, but the decreasing speed decreases with the increase of duty cycle of the switch tube; (2) when the duty cycle ratio of the output rectifier increases, the loss of each part of the output end and the turn-off loss of the switching tube will become smaller, but their decreasing speed will also decrease with the increase of the duty cycle of the output rectifier. In this paper, three groups of experiments are designed to verify: (1) the duty cycle of the output rectifier remains unchanged, only the duty cycle of the switch tube is changed, (2) the duty cycle of the switch tube remains unchanged, only the on-duty ratio of the output rectifier is changed. (3) at the same time, the duty cycle of the switch and the duty cycle of the output rectifier are changed with the fixed step. The simulation results show that when the duty cycle of switch is about 0.45 and the duty ratio of output rectifier is about 0.55, the efficiency of flyback switching power supply is the highest. The experimental results verify the theoretical analysis.
【學(xué)位授予單位】：遼寧工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM461

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 顧亦磊;呂征宇;杭麗君;錢(qián)照明;;一種適用于高壓輸出的軟開(kāi)關(guān)多諧振直流變流器[J];電工技術(shù)學(xué)報(bào);2006年04期

2 陳家m8;徐龍祥;;RCD箝位反激變換器的設(shè)計(jì)與實(shí)現(xiàn)[J];電源技術(shù)應(yīng)用;2002年10期

3 樊永隆;;反激式變換器中RCD箝位電路的設(shè)計(jì)[J];電源技術(shù)應(yīng)用;2006年12期

4 楊帆;陳志輝;;電感設(shè)計(jì)[J];電源技術(shù)應(yīng)用;2007年03期

5 林周布,張文雄,林元尊;反激型開(kāi)關(guān)電源的軟緩沖技術(shù)[J];電力電子技術(shù);2001年03期

6 張厚升;趙艷雷;;新型多功能反激式開(kāi)關(guān)電源設(shè)計(jì)[J];電力自動(dòng)化設(shè)備;2011年01期

7 黃海宏;王海欣;張毅;;同步整流的基本原理[J];電氣電子教學(xué)學(xué)報(bào);2007年01期

8 李德林;;關(guān)于隔離開(kāi)關(guān)電源幾個(gè)問(wèn)題的探討[J];電氣開(kāi)關(guān);2006年02期

9 房緒鵬;郭良兵;李春杰;孫小景;;基于UC3842的反激式開(kāi)關(guān)電源設(shè)計(jì)[J];山東科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年04期

10 桑泉;李坤;;采用準(zhǔn)諧振和同步整流技術(shù)的隔離功率開(kāi)關(guān)電源研究[J];通信電源技術(shù);2009年03期

相關(guān)博士學(xué)位論文 前1條

1 汪志剛;氮化鎵異質(zhì)結(jié)晶體管電荷控制模型與新結(jié)構(gòu)[D];電子科技大學(xué);2013年

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