本文選題：雙向DC-DC變換器　切入點(diǎn)：移相控制　出處：《燕山大學(xué)》2015年碩士論文

【摘要】：隨著科技的發(fā)展,新能源的應(yīng)用,雙向DC-DC變換器已廣泛應(yīng)用于直流微網(wǎng)系統(tǒng)、太陽能發(fā)電系統(tǒng)、混合動力電動車系統(tǒng)、節(jié)能電梯系統(tǒng)等領(lǐng)域。雙向DC-DC變換器已成為了各國學(xué)者的研究熱點(diǎn)。本文選取移相全橋雙向軟開關(guān)DC-DC變換器的回流功率問題為課題進(jìn)行研究。功率回流問題的存在會降低變換器效率,增加開關(guān)管電流應(yīng)力,減小軟開關(guān)范圍。本文首先對移相全橋雙向DC-DC變換器的工作原理進(jìn)行詳細(xì)分析,提出在移相全橋雙向DC-DC變換器工作過程中消除回流功率與實(shí)現(xiàn)軟開關(guān)之間存在一定制約性的觀點(diǎn)。然后通過對移相全橋雙向DC-DC變換器的拓?fù)溥M(jìn)行分析,在基于導(dǎo)抗網(wǎng)絡(luò)的全橋雙向DC-DC變換器的基礎(chǔ)上進(jìn)行改進(jìn),提出一種拓?fù)?并制定新的實(shí)驗(yàn)解決方案。通過理論分析及仿真驗(yàn)證,證明該方案可以解決移相全橋雙向DC-DC變換器的回流功率為零與全程軟開關(guān)之間存在制約性的問題。根據(jù)系統(tǒng)軟硬件設(shè)計(jì),搭建了實(shí)驗(yàn)平臺,對新方案進(jìn)行了實(shí)驗(yàn)驗(yàn)證。通過分析實(shí)驗(yàn)結(jié)果,本論文可以得出新方案能夠解決移相全橋電路的回流功率為零與全程軟開關(guān)存在制約性的問題的結(jié)論。
[Abstract]:With the development of science and technology and the application of new energy, bidirectional DC-DC converters have been widely used in DC microgrid system, solar power system, hybrid electric vehicle system, energy-saving elevator system and so on.Bidirectional DC-DC converters have become the research focus of scholars all over the world.In this paper, the reflux power problem of phase-shifted full bridge bi-directional soft switching DC-DC converter is studied.The problem of power reflux will reduce the efficiency of the converter, increase the current stress of the switch, and reduce the soft switching range.In this paper, the working principle of phase-shifted full-bridge bi-directional DC-DC converter is analyzed in detail, and the point of view that there is some constraint between eliminating backflow power and realizing soft switch in phase-shifted full-bridge bi-directional DC-DC converter is put forward.Then, by analyzing the topology of phase-shifted full-bridge bi-directional DC-DC converter, an improved full-bridge bi-directional DC-DC converter based on reactance network is proposed, and a new experimental solution is developed.Through theoretical analysis and simulation, it is proved that this scheme can solve the problem that the reflux power of phase-shifted full-bridge bi-directional DC-DC converter is zero and the whole process soft switching is constrained.According to the software and hardware design of the system, the experimental platform is built, and the new scheme is verified experimentally.By analyzing the experimental results, we can draw the conclusion that the new scheme can solve the problem of zero reflux power of phase-shifted full-bridge circuit and the constraint of full-process soft switching.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM46

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本文編號：1706215