磁粉探伤机可控硅充退磁装置设计毕业论文.doc

www.yanziedu.comwww.yanziedu.com安徽工业大学毕业设计论文任务书课题名称磁粉探伤机可控硅充退磁装置设计学院电气信息学院专业班级姓名学号毕业设计（论文）的工作内容1、介绍了课题的背景及研究意义，电力电子技术在磁粉检测中的应用2、可控硅调压的原理以及实现方法3、对可控硅调压主电路设计4、对可控硅门极触发电路设计5、对调压主电路进行MATLAB仿真起止时间2009年2月16日至2009年6月5日共15周指导教师签字系主任签字院长签字www.yanziedu.comwww.yanziedu.com摘要磁粉检测作为一种常用的对铁磁性材料工件表面和近表面进行无损检测的手段，近年来得到广泛的应用。铁磁性材料工件被磁化后，由于不连续性的存在，使工件表面和近表面的磁力线发生局部畸变而产生漏磁场，吸附施加在工件表面的磁场，在合适的光照下形成目视可见的磁痕，从而显示出不连续性的位置、大小、形状和严重程度。这就是磁粉检测的基本原理。由磁粉检测的基本原理可以看出检测过程中对工件进行充退磁的磁化电源对整个检测质量来说非常重要，对工件的磁化分为周向磁化和纵向磁化，周向磁化一般需要交流磁化电流，而纵向磁化需要直流磁化电流通过线圈的电磁感应对工件充磁。但不管是周向磁化的交流磁化电流还是纵向磁化的直流磁化电流，磁化电流都不能直接由工业电网提供。本次设计主要对周向磁化调压电路进行设计，周向磁化的磁化电源一般为低电压大电流的交流电源，需要对工业交流电进行调制来满足磁化需要，对电压电流的调制离不开电力电子技术，这就是本次设计的理论基础。本文正是基于移相控制的可控硅交流调压技术对磁粉检测的充退磁电源控制进行了详细论述并设计出调压控制电路。通过调节触发电路的触发脉冲的相位来控制晶闸管的通断，从而控制输出得到可人工调整的电压，再经过降压变压器得到可用于磁化的低压大电流磁化电源，它主要由可控硅调压主电路、触发电路等组成，是一种具有广阔应用前景的交流调压控制器。本文简要回顾了电力电子学和交流调压的发展过程，着重分析了交流移相式调压的理论，设计了调压的主电路以及触发电路。并对设计出的电路系统设定参数进行仿真和实验，得出了一系列的波形，并进行了分析。结果证明本方案是有效可行的。关键词磁粉检测可控硅调压触发电路电力电子移相控制Matlab仿真AbstractMagneticParticleTestingasacommonlymeanswhichusedmagneticmaterialstothewww.yanziedu.comwww.yanziedu.comironsurfaceandnearsurfacenondestructivetesting,hasawiderangeofapplicationsinrecentyears.Magneticmaterialsaremagnetizedironworkpieces,duetotheexistenceofdiscontinuities,sothatsurfaceandnearsurfaceoccurrenceofthemagneticlinesoflocalmagneticfielddistortionresultingfromleakage,adsorptiontoexertthemagneticfieldintheworkpiecesurfaceinappropriatevisualformcanbeseenunderthelightofthemagneticmarks,whichdonotshowthecontinuityofthelocation,size,shapeandextentoftheproblem.Thisisthebasicprincipleofmagneticparticletesting.Fromthebasicprinciplesofmagneticparticletestingcanbeseentestingtheprocessoffillingoftheworkpiecetothemagnetizationdemagnetizationdetectionofpowerqualityonthewholeisveryimportanttothemagnetizationoftheworkpieceisdividedintoweekstothemagnetizationandlongitudinalmagnetization,magnetizationusuallytakesweekstotheexchangeofmagnetizationcurrent,andtheneedforlongitudinalmagnetizationDCcurrentthroughtheelectromagneticinductioncoiltotheworkpieceMagnetizing.However,whethertheexchangeofmagnetizationtothemagnetizationcurrentortheDCmagnetizationlongitudinalmagnetizationcurrent,magnetizationcurrentcannotbedirectlyprovidedbytheIndustrialPower.Thedesignofthemainregulatoroftheweektothemagneticcircuitdesign,tothemagnetizationofthemagnetizationweeksupplyisgenerallyoflowvoltagehighcurrentACpower,theneedforindustrialACmagnetizationmodulationtomeettheneedsofthemodulationofthevoltageandcurrentcannotbeseparatedfrompowerelectronictechnology,whichisthetheoreticalbasisfordesign.Thisarticleisbasedonthyristorcontrolledphaseshiftingtechnologyfortheexchangeregulatorsmagneticparticletestingrechargeablepowercontroldemagnetizationdiscussedindetailanddesignavoltagecontrolcircuit.Triggercircuitbyadjustingthephaseofthetriggerpulsetocontroltheonoffthyristor,whichcanbemanuallycontrolledtoadjusttheoutputvoltage,andthen,afterstepdowntransformercanbeusedtoobtainthemagnetizationofthemagneticlowvoltagehighcurrentpowersupply,mainlybytheSCRthemainvoltageregulatorcircuit,triggercircuit,suchascomposition,isabroadapplicationprospectoftheexchangeregulatorcontroller.Inthispaper,abriefreviewofpowerelectronicsandACvoltageregulationofthedevelopmentprocess,focusingonananalysisofphaseshiftingexchangeregulatortheory,anddesignthemaincircuitvoltageregulatorandtriggercircuit.Circuitandsystemdesignparameterssetsimulationandexperiment,todrawaseriesofwaveform,andanalyzed.Theresultsprovethattheprogramisfeasibleandeffective.Circuitandsystemdesignparameterssetsimulationandexperiment,todrawaseriesofwaveform,andanalyzed.Theresultsprovethattheprogramisfeasibleandeffective.KeywordsMagneticParticleTestingThyristorregulatorTriggercircuitPowerElectronicsPhaseshiftcontrolMatlabsimulationwww.yanziedu.comwww.yanziedu.com目录摘要......................................................................................................................................1Abstract..................................................................................................................................2目录........................................................................................................................................4第一章绪论........................................................................................................................61.1背景和意义............................................................................................................61.2磁粉检测的原理及发展........................................................................................71.2.1磁粉检测基本原理......................................................................................71.2.2磁粉检测的发展..........................................................................................71.2.3磁粉检测现状..............................................................................................8