磁粉探傷機可控硅充退磁裝置設(shè)計畢業(yè)論文.doc

安徽工業(yè)大學(xué)畢業(yè)設(shè)計(論文)任務(wù)書課題名稱磁粉探傷機可控硅充退磁裝置設(shè)計學(xué)院電氣信息學(xué)院專業(yè)班級姓名學(xué)號畢業(yè)設(shè)計（論文）的工作內(nèi)容:1、介紹了課題的背景及研究意義，電力電子技術(shù)在磁粉檢測中的應(yīng)用2、可控硅調(diào)壓的原理以及實現(xiàn)方法3、對可控硅調(diào)壓主電路設(shè)計4、對可控硅門極觸發(fā)電路設(shè)計5、對調(diào)壓主電路進(jìn)行MATLAB仿真起止時間：2009年2月16日至2009年6月5日共15周指導(dǎo)教師簽字系主任簽字院長簽字摘要磁粉檢測作為一種常用的對鐵磁性材料工件表面和近表面進(jìn)行無損檢測的手段，近年來得到廣泛的應(yīng)用。鐵磁性材料工件被磁化后，由于不連續(xù)性的存在，使工件表面和近表面的磁力線發(fā)生局部畸變而產(chǎn)生漏磁場，吸附施加在工件表面的磁場，在合適的光照下形成目視可見的磁痕，從而顯示出不連續(xù)性的位置、大小、形狀和嚴(yán)重程度。這就是磁粉檢測的基本原理。由磁粉檢測的基本原理可以看出檢測過程中對工件進(jìn)行充退磁的磁化電源對整個檢測質(zhì)量來說非常重要，對工件的磁化分為周向磁化和縱向磁化，周向磁化一般需要交流磁化電流，而縱向磁化需要直流磁化電流通過線圈的電磁感應(yīng)對工件充磁。但不管是周向磁化的交流磁化電流還是縱向磁化的直流磁化電流，磁化電流都不能直接由工業(yè)電網(wǎng)提供。本次設(shè)計主要對周向磁化調(diào)壓電路進(jìn)行設(shè)計，周向磁化的磁化電源一般為低電壓大電流的交流電源，需要對工業(yè)交流電進(jìn)行調(diào)制來滿足磁化需要，對電壓電流的調(diào)制離不開電力電子技術(shù)，這就是本次設(shè)計的理論基礎(chǔ)。本文正是基于移相控制的可控硅交流調(diào)壓技術(shù)對磁粉檢測的充退磁電源控制進(jìn)行了詳細(xì)論述并設(shè)計出調(diào)壓控制電路。通過調(diào)節(jié)觸發(fā)電路的觸發(fā)脈沖的相位來控制晶閘管的通斷，從而控制輸出得到可人工調(diào)整的電壓，再經(jīng)過降壓變壓器得到可用于磁化的低壓大電流磁化電源，它主要由可控硅調(diào)壓主電路、觸發(fā)電路等組成，是一種具有廣闊應(yīng)用前景的交流調(diào)壓控制器。本文簡要回顧了電力電子學(xué)和交流調(diào)壓的發(fā)展過程，著重分析了交流移相式調(diào)壓的理論，設(shè)計了調(diào)壓的主電路以及觸發(fā)電路。并對設(shè)計出的電路系統(tǒng)設(shè)定參數(shù)進(jìn)行仿真和實驗，得出了一系列的波形，并進(jìn)行了分析。結(jié)果證明本方案是有效可行的。關(guān)鍵詞:磁粉檢測可控硅調(diào)壓觸發(fā)電路電力電子移相控制Matlab仿真AbstractMagneticParticleTironsurfaceandnear-surfacenon-destructivetesting,hasawiderangeofapplicationsinrecentyears.Magneticmaterialsaremagnetizedironworkpieces,duetotheexistenceofdiscontinuities,sothatsurfaceandnear-surfaceoccurrenceofthemagneticlinesoflocalmagneticfielddistortionresultingfromleakage,adsorptiontoexertthemagneticfieldintheworkpiecesurfaceinappropriatevisualformcanbeseenunderthelightofthemagneticmarks,whichdonotshowthecontinuityofthelocation,size,shapeandextentoftheproblem.Thisisthebasicprincipleofmagneticparticletesting.Fromthebasicprinciplesofmagneticparticletestingcanbeseentestingtheprocessoffillingoftheworkpiecetothemagnetizationdemagnetizationdetectionofpowerqualityonthewholeisveryimportanttothemagnetizationoftheworkpieceisdividedintoweekstothemagnetizationandlongitudinalmagnetization,magnetizationusuallytakesweekstotheexchangeofmagnetizationcurrent,andtheneedforlongitudinalmagnetizationDCcurrentthroughtheelectromagneticinductioncoiltotheworkpieceMagnetizing.However,whethertheexchangeofmagnetizationtothemagnetizationcurrentortheDCmagnetizationlongitudinalmagnetizationcurrent,magnetizationcurrentcannotbedirectlyprovidedbytheIndustrialPower.Thedesignofthemainregulatoroftheweektothemagneticcircuitdesign,tothemagnetizationofthemagnetization-weeksupplyisgenerallyoflow-voltagehigh-currentACpower,theneedforindustrialACmagnetizationmodulationtomeettheneedsofthemodulationofthevoltageandcurrentcannotbeseparatedfrompowerelectronictechnology,whichisthetheoreticalbasisfordesign.Thisarticleisbasedonthyristor-controlledphase-shiftingtechnologyfortheexchangeregulatorsmagneticparticletestingrechargeablepowercontroldemagnetizationdiscussedindetailanddesignavoltagecontrolcircuit.Triggercircuitbyadjustingthephaseofthetriggerpulsetocontroltheon-offthyristor,whichcanbemanuallycontrolledtoadjusttheoutputvoltage,andthen,afterstep-downtransformercanbeusedtoobtainthemagnetizationofthemagneticlow-voltagehigh-currentpowersupply,mainlybytheSCRthemainvoltageregulatorcircuit,triggercircuit,suchascomposition,isabroadapplicationprospectoftheexchangeregulatorcontroller.Inthispaper,abriefreviewofpowerelectronicsandACvoltageregulationofthedevelopmentprocess,focusingonananalysisofphase-shiftingexchangeregulatortheory,anddesignthemaincircuitvoltageregulatorandtriggercircuit.Circuitandsystemdesignparameterssetsimulationandexperiment,todrawaseriesofwaveform,andanalyzed.Theresultsprovethattheprogramisfeasibleandeffective.Circuitandsystemdesignparameterssetsimulationandexperiment,todrawaseriesofwaveform,andanalyzed.Theresultsprovethattheprogramisfeasibleandeffective.KeywordsMagneticParticleTestingThyristorregul