本文選題：多路輸出 + 正反激變換器��； 參考：《東北石油大學(xué)》2014年碩士論文

【摘要】：由于供電系統(tǒng)的需要，高性能、高可靠性，小體積的供電設(shè)備在電信和數(shù)據(jù)通信系統(tǒng)中受到越來越多的關(guān)注。在現(xiàn)在的用電設(shè)備里，如常見的計(jì)算機(jī)和其他的電子設(shè)備，都需要多個等級的電壓同時為其供電，如果每一個用電設(shè)備所需要的各個等級電壓都使用一個單獨(dú)的變換器，這樣必然使設(shè)備的體積和成本增加。便攜式電子產(chǎn)品的發(fā)展對其供電設(shè)備提出了越來越高的要求，多路輸出開關(guān)電源作為便攜式用電設(shè)備的供電電源，已經(jīng)成為人們研究的熱點(diǎn)及未來發(fā)展的趨勢。 本文通過對多路輸出開關(guān)電源的基本拓?fù)浣Y(jié)構(gòu)、工作原理和適用范圍進(jìn)行了系統(tǒng)研究和比較后，針對普通直流變換器需要額外的磁復(fù)位電路，造成供電設(shè)備體積大，負(fù)載電流大小的改變對輸出電壓影響大，以及電路效率普遍不高等缺點(diǎn)，，綜合了正激變換器和反激變換器的優(yōu)點(diǎn)，設(shè)計(jì)了一款正反激電路拓?fù)浣Y(jié)構(gòu)電路，并對該正反激電路的工作模式進(jìn)行了分析，把正反激電路拓?fù)浣Y(jié)構(gòu)作為本文設(shè)計(jì)的三路輸出直流變換器其中一路輸出，有效提高了電路效率，減輕了設(shè)備體積。 通過分析比較現(xiàn)有的多路輸出直流變換器的控制方法，針對這些控制方法不能對輸出電壓進(jìn)行精確控制，電路交叉調(diào)整率高的缺點(diǎn)，本文采用脈寬調(diào)制脈寬延遲技術(shù)對設(shè)計(jì)的三路輸出直流變換器進(jìn)行控制。運(yùn)用小信號模型分析法對其等效電路進(jìn)行了分析和計(jì)算，并通過仿真方法進(jìn)行了驗(yàn)證，計(jì)算及仿真方法得出的結(jié)果一致。采用本文設(shè)計(jì)的電路結(jié)構(gòu)和控制方法，在有效提高多路輸出直流變換器的效率同時有效改善其交叉調(diào)整率。
[Abstract]:Due to the need of power supply system, high performance, high reliability, small volume power supply equipment has attracted more and more attention in telecommunication and data communication systems. In today's electrical equipment, such as common computers and other electronic devices, multiple levels of voltage are required to power them at the same time, and if each level of voltage required for each of the devices uses a separate converter, This will inevitably increase the volume and cost of the equipment. The development of portable electronic products has put forward higher and higher requirements for its power supply equipment. As a power supply for portable electrical equipment, multi-output switching power supply has become a hot spot and future development trend of people. In this paper, the basic topology, working principle and applicable range of multi-channel output switching power supply are systematically studied and compared, and the additional magnetic reset circuit is needed for ordinary DC / DC converter, which results in the large volume of power supply equipment. The change of load current has great influence on the output voltage, and the circuit efficiency is not high. This paper combines the advantages of forward converter and flyback converter, and designs a topology circuit of forward and flyback circuit. The working mode of the forward and flyback circuit is analyzed. The topology of the forward and flyback circuit is used as one of the three output DC / DC converters designed in this paper, which effectively improves the circuit efficiency and reduces the volume of the equipment. By analyzing and comparing the existing control methods of multi-channel DC / DC converter, the disadvantages of these control methods are that the output voltage can not be controlled accurately and the circuit cross adjustment rate is high. In this paper, pulse width modulation (PWM) pulse-width delay technique is used to control the designed three-channel DC / DC converter. The equivalent circuit is analyzed and calculated by using the small signal model analysis method, and verified by the simulation method. The results obtained by the calculation and the simulation method are consistent. The circuit structure and control method designed in this paper can effectively improve the efficiency of the multi-channel DC / DC converter and improve its crossover adjustment rate.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 周澤坤;單片大功率DC-DC變換器高性能控制方法研究[D];電子科技大學(xué);2012年

本文編號：2072729