资源描述：
《次级整流点焊电流波形液晶显示与控制》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、石此二么大李硕士李住格久AbstractWithaseriesofuniquecharacteristicssuchaslowinputcapacity,highthermalefficiency,bigpowerfactor,excellentweldingjoints,andsoon,thesinglephasesecondaryrectifyingspotweldinghaswidelybeenusedinindustry.However,thecontrollingsystemofsingle-phasesecondaryrectifyingspotweldingmachineisb
2、asicallyACspotweldingmachine's,soitisnotfitforspecialspotweldingtechnology.Therefore,hardwarecircuitsofcontrollingsystemonthesinglesecondaryrectifyingspotweldingandliquidcrystalsystemtodisplaycurrentwaveformsaredesignedonbaseofan89C52SCMandaSED1335FLCDcontroller.Basedontheoreticanalysis,theprecisem
3、athematicmodeofcontrollingsystemandareasonablephase-shiftingrangeofcontrollingangleareestablished,andinallusiontotherisingslopeofcurrentwaveforms,anewmethodonmagneticcompensationisputforwardonthebaseofpre-technologicexperimentationforsinglephasesecondaryrectifyingspotwelding.Duringthecourseofdesign
4、ingsoftware,astepof1%andcontrollingangleaaresetto0.25%and0.0180respectively,andthevoltageiscompensatedinhalf-cycle,whichevidentlyenhancescontrollingsystem'sprecision.Inthisthesis,allofprogramsaremadewithC51andAssembler.What'smore,itishelpfultoread,transplant,maintenance,andalsotoshortendevelopcycle
5、thatsubprogramsaboutreadingweldparameters,voltageandmagneticcompensation,liquidcrystaldisplayanddelayarerespectivelydesignedtoasinglemodule.Thehardwareandsoftwaresystemabovehassuccessfullybeendebugged,andthedebugresultsproveitavailablethatthesystemcanachievesinglephasesecondaryrectifyingspotwelding
6、processandreal-timedisplayweldcurrentwaveformsontheliquidcrystalscreen,whichaccordswithdesignpurpose.Inaword,thesystemofsingle-phasesecondaryrectifyingspotweldingcontrolledbyan89C52SCMandreal-timedisplayingweldcurrentwaveformswithliquidcrystalisofimportantengineeringvalueinthefutureKeywords:single-
7、phasesecondaryrecti斤spotweldcontrolliquidcrystaldisplaymagneticcompensatingmix舀此二乒大李硕士李位伦式第一章绪论1.1次级整流点焊及其发展现状次级整流点焊是六十年代随着大功率二极管及晶闸管的出现及能源危机的发生而发展起来的一种新型焊接方法[z1。几十年来，由于科学技术的进步，尤其是计算机技术的迅速发展，使次级整流焊机的控制水平和焊接
