本文選題：數(shù)字電源　切入點(diǎn)：數(shù)字信號(hào)處理　出處：《湖南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電子科學(xué)技術(shù)的不斷發(fā)展，人們對(duì)電源的要求日益增高，模擬電路解決方案越來(lái)越難以滿足要求，數(shù)字電源便應(yīng)運(yùn)而生。數(shù)字電源主要是采用數(shù)字的方式來(lái)實(shí)現(xiàn)電源的智能控制、保護(hù)電路和通信接口的新型電源技術(shù)。數(shù)字信號(hào)處理器DSP的發(fā)展更加促進(jìn)了開(kāi)關(guān)電源數(shù)字化的進(jìn)程。文章介紹了DSP作為電源的控制核心，通過(guò)控制電源的功率開(kāi)關(guān)管，實(shí)現(xiàn)了對(duì)輸出電壓的精確控制。 系統(tǒng)由功率因數(shù)校正電路、直流轉(zhuǎn)換電路和控制部分電路三部分組成。在介紹功率因數(shù)校正電路基本原理的基礎(chǔ)上，選擇升壓型拓?fù)浣Y(jié)構(gòu)；通過(guò)平均電流控制方法，對(duì)電路中各元件的參數(shù)進(jìn)行計(jì)算和選擇，完成元器件的選型；采用電壓電流雙環(huán)控制結(jié)構(gòu)及PI算法，建立了數(shù)學(xué)模型，實(shí)現(xiàn)功率因數(shù)校正電路的設(shè)計(jì)。直流轉(zhuǎn)換電路部分完成了后半部分的DC/DC電路的設(shè)計(jì)。根據(jù)設(shè)計(jì)的實(shí)際需求，在介紹的幾種常見(jiàn)經(jīng)典拓?fù)浣Y(jié)構(gòu)中選擇了一種并對(duì)其進(jìn)行改進(jìn)，最終確定了包含同步整流結(jié)構(gòu)的具有多路輸出雙管單端正激結(jié)構(gòu)；在選定變壓器、電感等磁性元件基礎(chǔ)上，設(shè)計(jì)了控制部分和驅(qū)動(dòng)電路等外圍電路。控制部分采用DSP作為主控制芯片，，主要利用到DSP內(nèi)部的事件管理器模塊和模數(shù)轉(zhuǎn)換模塊，通過(guò)軟件編程對(duì)電路中的電壓電流進(jìn)行采樣，輸出合適的PWM波形控制電路中開(kāi)關(guān)管的通斷時(shí)間以達(dá)到調(diào)節(jié)輸出電壓的目的。 通過(guò)搭建實(shí)驗(yàn)及檢測(cè)電路，對(duì)各個(gè)模塊進(jìn)行了相應(yīng)的仿真和實(shí)驗(yàn)，仿真結(jié)果表明電源能實(shí)現(xiàn)功率因數(shù)校正的作用，最后的輸出電壓為三路16V，功率能達(dá)到500W，證明了方案的可行。
[Abstract]:With the development of electronic science and technology, the demand for power supply is increasing, and analog circuit solutions are becoming more and more difficult to meet the requirements. The digital power supply comes into being. The digital power supply mainly adopts the digital method to realize the intelligent control of the power supply. The development of digital signal processor (DSP) promotes the digitization process of switching power supply. This paper introduces DSP as the control core of power supply, which is controlled by power switch tube of power supply. The accurate control of output voltage is realized. The system consists of three parts: power factor correction circuit, DC converter circuit and control circuit. On the basis of introducing the basic principle of power factor correction circuit, the boost topology is selected, and the average current control method is adopted. The parameters of each component in the circuit are calculated and selected to complete the selection of components, and the mathematical model is established by using the voltage and current double loop control structure and Pi algorithm. The design of the power factor correction circuit is realized. The DC conversion circuit completes the design of the DC/DC circuit in the second half. According to the actual requirements of the design, one of the common classical topologies is selected and improved. Finally, the multi-channel output double-transistor single-terminal forward structure with synchronous rectifier structure is determined. Based on the selection of magnetic elements such as transformer, inductor, etc. In the control part, DSP is used as the main control chip, which is mainly used in the event manager module and analog-to-digital conversion module of DSP, and the voltage and current in the circuit are sampled by software programming. The switching time of the switch in the PWM waveform control circuit can be adjusted to adjust the output voltage. The simulation results show that the power supply can realize the function of power factor correction. The final output voltage is three channels 16V and the power can reach 500W, which proves the feasibility of the scheme.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 楊亮;張慶磊;王珍珍;王傳剛;;一種移相全橋DC/DC變換器的設(shè)計(jì)[J];電子科技;2015年10期

相關(guān)碩士學(xué)位論文 前4條

1 劉日平;六面頂壓機(jī)水冷功率控制系統(tǒng)的研究[D];鄭州大學(xué);2016年

2 暨利勇;直接驅(qū)動(dòng)數(shù)控轉(zhuǎn)臺(tái)伺服系統(tǒng)抗負(fù)載擾動(dòng)研究[D];南京航空航天大學(xué);2016年

3 孫培剛;沙基機(jī)器人供電系統(tǒng)設(shè)計(jì)[D];寧夏大學(xué);2015年

4 馬澤偉;數(shù)字控制升壓型DC/DC轉(zhuǎn)換器的設(shè)計(jì)[D];西安電子科技大學(xué);2014年

本文編號(hào)：1595786