本文關(guān)鍵詞： 電源 沖擊電流 快速熱插拔 門(mén)限電路　出處：《武漢大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：電子信息時(shí)代,消費(fèi)電子產(chǎn)品、物聯(lián)網(wǎng)智能家居、網(wǎng)絡(luò)通信平臺(tái)等電子設(shè)備對(duì)人們?nèi)粘Ｉ畹挠绊懺絹?lái)越大。而這些電子設(shè)備的核心便是電源,電源為所有的系統(tǒng)電路提供一定功率的電能。隨著開(kāi)關(guān)電源的面世,電源由傳統(tǒng)的高功耗、大體積逐漸發(fā)展成如今的輕小、低功耗、高效率。其中,電源的效率與安全穩(wěn)定性兩個(gè)特點(diǎn)備受廣大的電源開(kāi)發(fā)者的關(guān)注。在通信系統(tǒng)中最常見(jiàn)的電源操作便是電源的熱插拔。而熱插拔引起的沖擊電流效應(yīng)會(huì)對(duì)電源的安全穩(wěn)定性造成很大的影響,所以熱插拔一直是業(yè)內(nèi)關(guān)注的主要問(wèn)題。為此,全球范圍內(nèi)以美信、德州儀器和亞德諾為代表的半導(dǎo)體公司都針對(duì)熱拔插的問(wèn)題提出了自己的解決方案和相對(duì)應(yīng)的控制器芯片。此外,出于電路成本以及實(shí)際系統(tǒng)電路的電源接口情況考慮,長(zhǎng)短針?lè)ㄒ种茮_擊電流電路和分立器件有源沖擊電流抑制電路都存在著一定的應(yīng)用。本文在分析研究熱插拔沖擊電流問(wèn)題的基礎(chǔ)上,探究了通信電路系統(tǒng)中熱插拔偶爾會(huì)導(dǎo)致緩慢啟動(dòng)電路失效的問(wèn)題。在快速熱插拔的時(shí)候,系統(tǒng)電路的后級(jí)儲(chǔ)能電容會(huì)反灌電流到前級(jí)的低阻抗回路,從而影響開(kāi)關(guān)管柵極充放電電容的及時(shí)放電。此時(shí)單板快速熱插拔必然會(huì)導(dǎo)致未關(guān)斷的開(kāi)關(guān)管無(wú)法正常進(jìn)入緩慢啟動(dòng)狀態(tài)。針對(duì)電路單板的快速熱插拔操作引起的電源緩慢啟動(dòng)模塊失效問(wèn)題,本文提出了采用門(mén)限電壓控制電路結(jié)合有限沖擊電流抑制電路的電路設(shè)計(jì)方案。系統(tǒng)電路設(shè)計(jì)主要包含輸入電源充放電模塊、上電電壓斜率控制模塊、門(mén)限電壓控制模塊與其他輔助設(shè)計(jì)電路模塊。在針對(duì)每個(gè)電路模塊進(jìn)行理論分析之后,本文采用電源專業(yè)仿真軟件Saber進(jìn)行系統(tǒng)電路的仿真驗(yàn)證分析。不同于一般的電路仿真軟件,Saber是一款全球最先進(jìn)的綜合系統(tǒng)化仿真軟件。仿真分析結(jié)果表明本次設(shè)計(jì)具備可行性而且其在電源熱插拔時(shí)的工作狀態(tài)基本與理論分析一致。在實(shí)際電路測(cè)試分析之前,本文對(duì)分立元器件的選型規(guī)范做了詳細(xì)的闡述并結(jié)合系統(tǒng)電路的設(shè)計(jì)需求進(jìn)行了元器件選購(gòu)。實(shí)際測(cè)試表明,在分立器件有源沖擊電流限制電路上加入門(mén)限控制電路可以很好的實(shí)現(xiàn)阻斷后級(jí)儲(chǔ)能元件反灌電流,從而解決單板快速熱插拔引起的緩慢啟動(dòng)電路失效的問(wèn)題�？傊�,系統(tǒng)電路實(shí)際測(cè)試良好,電路設(shè)計(jì)簡(jiǎn)單且成本較低,在大型電路系統(tǒng)涉及到單板快速熱拔插的時(shí)候具有很好的應(yīng)用價(jià)值。
[Abstract]:In the era of electronic information, consumer electronic products, Internet of things smart home, network communication platform and other electronic devices have more and more influence on people's daily life. And the core of these electronic devices is power supply. Power supply provides certain power for all system circuits. With the advent of switching power supply, power supply from traditional high power, large volume gradually developed into today's light, low power consumption, high efficiency. The efficiency and safety and stability of power supply have attracted the attention of the majority of power developers. The most common operation of power supply in communication system is the hot plug of power supply. The impact current effect caused by hot plug will affect the power supply. Safety and stability have a great impact. So hot swapping has always been a major concern in the industry. For this reason, the United States across the globe. The semiconductor companies represented by Texas Instruments and Adriano have put forward their own solutions and corresponding controller chips to the hot plug problem. Considering the cost of the circuit and the power interface of the actual system circuit. There are some applications in both the long-short needle current suppression circuit and the discrete device active impulse current suppression circuit. In this paper, the hot plug impulse current problem is analyzed and studied. This paper probes into the problem that the hot plug in the communication circuit system occasionally leads to the failure of the slow start circuit. At the time of fast hot swapping, the energy storage capacitor of the system circuit will reverse the current to the low impedance loop of the front stage. This will affect the timely discharge of the charging and discharging capacitance of the switch gate. At this time, the rapid hot swapping of the single board will inevitably lead to the unturned switch tube can not enter the slow start state normally. The fast hot swapping operation of the single board of the circuit will lead to the fast hot swapping operation of the circuit board. Failure of the power supply slow start module. In this paper, a circuit design scheme using threshold voltage control circuit combined with limited impulse current suppression circuit is proposed. The circuit design of the system mainly includes charge and discharge module of input power supply and control module of voltage slope. Threshold voltage control module and other auxiliary design circuit modules. After theoretical analysis for each circuit module. In this paper, the power professional simulation software Saber is used to verify and analyze the system circuit, which is different from the general circuit simulation software. Saber is one of the most advanced comprehensive and systematic simulation software in the world. The simulation results show that the design is feasible and its working state in hot plug out of power supply is basically consistent with the theoretical analysis. Before the road test analysis. In this paper, the specification of the type selection of discrete components is described in detail, and combined with the design requirements of the system circuit, the components are selected and purchased. The actual test shows that. Adding threshold control circuit to the active impulse current limiting circuit of discrete device can block the backflow current of energy storage element. In short, the system circuit is tested well, the circuit design is simple and the cost is low. It has a good application value when the large circuit system involves the single board rapid hot-plug.
【學(xué)位授予單位】：武漢大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN86

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