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1、畢業(yè)論文（20__屆）熒光燈電子鎮(zhèn)流器設(shè)計摘要熒光燈是一種典型的低壓氣體放電燈，需要與鎮(zhèn)流器配套以確保燈管穩(wěn)定工作。與傳統(tǒng)的電感式鎮(zhèn)流器相比，電子鎮(zhèn)流器因具有節(jié)能、高功率因數(shù)、自身耗能少等諸多優(yōu)點而得到廣泛的研究?？烧{(diào)光熒光燈作為一種節(jié)能照明電器，解決了限制熒光燈普及的問題，并進一步向集成化、模塊化、多功能、高可靠和大功率方向發(fā)展。文章結(jié)合熒光燈的工作原理，設(shè)計了可調(diào)光熒光燈電子鎮(zhèn)流器，并確定其電路參數(shù)。整個設(shè)計電路由5個模塊組成。首先選用全波橋式整流濾波電路來實現(xiàn)干擾抑制濾波和輸入整流濾波的功能。高

2、頻逆變電路采用電壓饋電半橋式逆變器電路。電子鎮(zhèn)流器的驅(qū)動芯片則采用IR2153，較其他驅(qū)動芯片相比，其頻率穩(wěn)定性更好，改善了集成電路的抗干擾性。該電路最重要的是可調(diào)光的控制。文章詳細介紹了基于NE555定時器組成的多諧振蕩器控制電路的基本工作原理。通過調(diào)節(jié)可變電阻的阻值來改變其振蕩頻率和輸出方波占空比，從而改變了其輸出的平均電壓，實現(xiàn)熒光燈的亮度可調(diào)。關(guān)鍵詞：熒光燈；電子鎮(zhèn)流器；節(jié)能；可調(diào)光AbstractThefluorescentlampisatypicallow-pressuregasdisch

3、argelampwhichrequiresworkingwithballaststoensurethestableoperationofthelamp.Comparingwithtraditionalelectromagneticones,electronicballastsarewidelyresearchedforitsenergy-saving,highpowerfactor,lessenergyconsumptionetc.Dimmablefluorescentlampsasanenergy-

4、savinglightingelectricalappliancesresolvetheissuesoflimitingthewidespreadoffluorescentlampsandfurtherdeveloptotheorientationofintegration,modularization,multifunction,highreliableandhighpower.Combinedwiththeworkingprincipleoffluorescentlamps,thispaperde

5、signsdimmableelectronicballastsanddeterminesitscircuitparameters.Thewholedesignedcircuitconsistsoffivemodules.First,choosingFull-wavebridgerectifierfiltercircuittoachievethefunctionofinterferencesuppressionfilteringandinputrectifierfiltering.Highfrequen

6、cyinvertercircuitadoptsvoltagefeedsemi-bridgesystemconverterelectriccircuit.ThedriverICofelectronicballastsusesIR2153.ComparedwithotherdriverIC,thefrequencystabilityisbetterandtheanti-jammingofintegratedcircuitsisimproved.Thekeyofthecircuitisthedimmingc

7、ontrol.ThispaperdetailedlyintroducesthebasicworkingprincipleofmultivibratorcontrolcircuitthatbasedonNE555timer.Byadjustingtheresistivityofvariableresistance,itcanchangetheoscillationfrequencyandoutputsquarewavedutycycle,thereby,shiftingtheoutputaveragev

8、oltagetomakethebrightnessoffluorescentlampadjustable.KeyWords:fluorescentlamp;electronicballasts;energy-saving;dimming目錄1　引言12　總體設(shè)計22.1總體設(shè)計要求22.2系統(tǒng)總體框圖23　硬件設(shè)計33.1干擾抑制濾波電路33.1.1EMI濾波器的基本類型33.1.2EMI濾波電路43.2輸入整流濾波電路43.3高頻逆變電路53.3.1半