高頻通信開(kāi)關(guān)電源的研究與設(shè)計(jì)

電氣自動(dòng)化論文編號(hào):ZD438  論文字?jǐn)?shù):22664,頁(yè)數(shù):44，有開(kāi)題報(bào)告，任務(wù)書(shū)，文獻(xiàn)綜述
 
目  錄
前言……………………………………………………………………………………………1
摘 要……………………………………………………………………………………………1
第1章 高頻通信開(kāi)關(guān)電源總體電路設(shè)計(jì)………………………………………2
 1.1概述…………………………………………………………………………………2
 1.2 部分電路介紹…………………………………………………………………2
第2章 通信開(kāi)關(guān)電源主體電路的設(shè)計(jì)……………………………………………4
 2.1 EMI電路的設(shè)計(jì)………………………………………………………………4
 2.1.1開(kāi)關(guān)電源產(chǎn)生EMI的機(jī)理 ……………………………………………5
 2.1.2輻射EMI的抑制措施………………………………………………………6
 2.1.3 開(kāi)關(guān)電源EMI濾波器的電路設(shè)計(jì)………………………………………7
 2.2 輸入整流濾波電路的設(shè)計(jì)……………………………………………………8
 2.3 DC/AC逆變電路設(shè)計(jì)…………………………………………………………11
 2.3.1 全橋式變換器工作方式的選擇……………………………………11
 2.3.2 電路基本原理……………………………………………………………13
 2.3.2 開(kāi)關(guān)管的選擇……………………………………………………………16
 2.4 高頻變壓器設(shè)計(jì)………………………………………………………………18
 2.5 輸出整流濾波電路的設(shè)計(jì)…………………………………………………20
第3章 PWM控制電路的設(shè)計(jì)………………………………………………………22
 第4章 反饋電路的設(shè)計(jì)……………………………………………………………29
 4.1 系統(tǒng)模型的建立………………………………………………………………29
 4.2閉環(huán)系統(tǒng)的具體設(shè)計(jì)…………………………………………………………30
  4.2.1電流環(huán)的電路設(shè)計(jì)………………………………………………………30
  4.2.2電壓環(huán)的電路設(shè)計(jì)………………………………………………………30
 第5章 各保護(hù)、報(bào)警電路的設(shè)計(jì)…………………………………………………32
 5.1 軟啟動(dòng)電路的設(shè)計(jì)……………………………………………………………32
 5.2 過(guò)流過(guò)壓保護(hù)…………………………………………………………………32
 5.2.1 限流式保護(hù)………………………………………………………………32
 5.2.2 切斷式保護(hù)………………………………………………………………33
 5.3 欠壓、過(guò)壓保護(hù)………………………………………………………………34
第6章 總結(jié)…………………………………………………………………………………36
參考文獻(xiàn)……………………………………………………………………………………36
致 謝…………………………………………………………………………………………37
附錄 總電路圖……………………………………………………………………………38

摘 要：本文分析了國(guó)內(nèi)外高頻開(kāi)關(guān)電源的發(fā)展和現(xiàn)狀，研究了高頻開(kāi)關(guān)電源的基本原理以及高頻開(kāi)關(guān)電源在通信系統(tǒng)中的應(yīng)用，設(shè)計(jì)出一種實(shí)用于電信程控系統(tǒng)的高頻開(kāi)關(guān)電源，以替代傳統(tǒng)的相控電源。該系統(tǒng)以IGBT作為功率開(kāi)關(guān)器件，構(gòu)成移相全橋逆變，采用脈寬調(diào)制（PWM）技術(shù)，它的開(kāi)關(guān)頻率為100KHz。PWM控制信號(hào)由集成控制器UC3895產(chǎn)生，從輸出實(shí)時(shí)采樣電壓反饋信號(hào)，以控制輸出電壓的變化，控制電路和主電路之問(wèn)通過(guò)變壓器或光電耦合器進(jìn)行隔離，并設(shè)計(jì)了軟啟動(dòng)和過(guò)流保護(hù)電路。通過(guò)實(shí)驗(yàn)證明該系統(tǒng)能安全、可靠運(yùn)行，達(dá)到了設(shè)計(jì)要求。
 關(guān)鍵詞：高頻開(kāi)關(guān)電源；移相全橋；PWM；MOSFET
 
 High-frequency switch power supply for Competence
 Abstract：This paper has analyzed the development of the domestic and international high-frequency switch power and current situation, have studied the basic principle of the high-frequency switch power and high-frequency application in the communication system of switch power, it is practical in the high-frequency switch power of the programmer-controlled system of telecommunications to design one, in order to substitute traditional accusing of the power. System this regard IGBT as power switch device, is it move the whole bridge is it to go against, adopt pulse width modulate (PWM) technology to form, its switch frequency is 100KHz. PWM control signal produce by integrated controller UC3895, sample the feedback signal of the voltage in real time outputting, in order to is it output change of voltage to control, control circuit and main circuit is it isolate through the voltage transformer or the photoelectrical coupler to ask, design soft to start and is it is it protect the circuit to shed to pass. The experimental results show that the System can work safely and reliably.
 Keyword：High-frequency switch power； Phase Shifting Control Full Bridge；PWM； MOSFET