磁粉探傷機(jī)可控硅充退磁裝置設(shè)計(jì)畢業(yè)論文.doc

安徽工業(yè)大學(xué)畢業(yè)設(shè)計(jì)(論文)任務(wù)書(shū)課題名稱磁粉探傷機(jī)可控硅充退磁裝置設(shè)計(jì)學(xué)院電氣信息學(xué)院專業(yè)班級(jí)姓名學(xué)號(hào)畢業(yè)設(shè)計(jì)（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(cè)中的應(yīng)用2、可控硅調(diào)壓的原理以及實(shí)現(xiàn)方法3、對(duì)可控硅調(diào)壓主電路設(shè)計(jì)4、對(duì)可控硅門極觸發(fā)電路設(shè)計(jì)5、對(duì)調(diào)壓主電路進(jìn)行MATLAB仿真起止時(shí)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(zhǎng)簽字摘要磁粉檢測(cè)作為一種常用的對(duì)鐵磁性材料工件表面和近表面進(jìn)行無(wú)損檢測(cè)的手段，近年來(lái)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(chǎng)，吸附施加在工件表面的磁場(chǎng)，在合適的光照下形成目視可見(jiàn)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(cè)的基本原理。由磁粉檢測(cè)的基本原理可以看出檢測(cè)過(guò)程中對(duì)工件進(jìn)行充退磁的磁化電源對(duì)整個(gè)檢測(cè)質(zhì)量來(lái)說(shuō)非常重要，對(duì)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(guò)線圈的電磁感應(yīng)對(duì)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(jì)主要對(duì)周向磁化調(diào)壓電路進(jìn)行設(shè)計(jì)，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(duì)工業(yè)交流電進(jìn)行調(diào)制來(lái)滿足磁化需要，對(duì)電壓電流的調(diào)制離不開(kāi)電力電子技術(shù)，這就是本次設(shè)計(jì)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(duì)磁粉檢測(cè)的充退磁電源控制進(jìn)行了詳細(xì)論述并設(shè)計(jì)出調(diào)壓控制電路。通過(guò)調(diào)節(jié)觸發(fā)電路的觸發(fā)脈沖的相位來(lái)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(guò)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(jiǎn)要回顧了電力電子學(xué)和交流調(diào)壓的發(fā)展過(guò)程，著重分析了交流移相式調(diào)壓的理論，設(shè)計(jì)了調(diào)壓的主電路以及觸發(fā)電路。并對(duì)設(shè)計(jì)出的電路系統(tǒng)設(shè)定參數(shù)進(jìn)行仿真和實(shí)驗(yàn)，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(cè)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