




已阅读5页,还剩3页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
附录附录A:中英文参考文献此英文文献摘自参考文献:DonescuV,CharetteA,YaoZ,etal.ModelingandsimulationofSaturatedinductionmotorsinphasequantitiesJ.IEEETrans.OnEnergyConversion,1999,14(3):386-393.ModerntypeofACDriveSystemExchangeintoamodernACmotorspeedcontrolsystem,powerelectronicpowerconverters,controllersandfourmajordetectorcomponents.InaccordancewiththeobjectofdifferenttypesofACmotor,speedofmoderncommunicationsystemscanbedividedintoinductionmotorandsynchronousmotordrives.Hereareintroducedthesystemofinductionmotor.1.1inductionmotorspeedcontrolsystemofthebasictypesofBytheinductionmotorworkingprinciple,wecanseethatfromthestatorintoelectromagneticpowercanbedividedintotwoparts:mp=(1-s)Mpistheeffectivepowerloaddrag;anotherpartofthedeteriorationofqualityofpowersp=sMpandsisproportionaltoslip.Howtodealwithdeteriorationofqualityofpowerisconsumedorfeedbacktothegrid,andmeasurablesystemofinductionmotorefficiency.Thereforebypoorpowertothedifferenttreatmentofmoderninductionmotorcanbedividedintothreetypesofspeedcontrolsystem.(1)powerconsumptionanddeteriorationofquality-basedspeedcontrolsystemPoorpowerswitchareconvertedtotheformofcaloriesconsumed.ThyristorSurgespeedfallintothiscategory.Intheinductionmotorspeedcontrolsystem,theminimumefficiencyofsuchsystemsistoincreasepowerconsumptionanddeteriorationofqualityinexchangeforthecostoflowerspeed.(2)topoorpowerfeedback-basedspeedcontrolsystemTodeterioratetoasmallportionofpowerconsumedbythemajorityofvariableflowcontroldevicestothepowergridfeedback.Lowerspeed,morepowertorepay.Woundcascadeinductionmotorspeedanddoubly-fedfallintothiscategory.(3)todeterioratetothesamepower-basedspeedcontrolsystemAnddeteriorationofqualityofpowerintherotorpartoftheconsumptionofcopperlossisinevitable,butinsuchsystems,bothhighandlowspeed,powerconsumptionanddeteriorationofqualityisessentiallythesame,thereforehighefficiency.VVVFfallintothiscategory.ACDriveSystemiscurrentlyin,theapplicationofamaximumofVVVF,themostextensive,canconstituteahighdynamicperformanceofACDriveSystemtoreplacetheDCdrive.1.2ACspeedcontrolsystemofmoderndevelopmenttrendsanddevelopmentsLookingatthespeedofdevelopmentoftheexchangeprocessandthestatusquo,wecanseethatspeedofmoderncommunicationtechnologytrendsandfuturedevelopmenttrends.(1)toreplacetheDCdrivesystemforthepurposeofexchangeofhigh-performancespeedcontrolsystemforfurtherresearchanddevelopment;(2)thenewpowerconvertertopologyoftheresearchanddevelopment;(3)PWMmodeofimprovementandoptimization;(4)mediumvoltagevariablefrequencydeviceresearchandtechnologydevelopment.1.2.1ControlconceptsandcontroltechnologyresearchanddevelopmentApplicationofmorethanadecadeshowthatthetheoryofvectorcontrolandotherapplicationofcontroltheoryhasyettobegovernorwiththedevelopmentoftheexchangecontinuedtoberefined,soastofurtherenhancetheexchangeofthecontrolperformancespeedcontrolsystem.Variouscontrolstructuresarebasedonmathematicalmodeloftheobject,therefore,inordertoestablishareasonableexchangeofspeedcontrolsystemapplicabletothecontrolstructure,needtoexchangethemotormathematicalmodelofthenature,characteristicsandtheinherentlawofin-depthstudyanddiscussion.ACDriveSysteminparticular,thesynthesisandcalibrationmethodsofthetheoryandengineeringdesignoffutureACDriveSystemisanimportantresearchtopic.Bytherotorflux-orientedinductionmotorvectorcontrolsystemtoachievetheexcitationcurrentandtorquecurrentfulldecoupling,themathematicalmodelandtheDCtorquemotortorqueexactlythesamemodel.However,theestimatedrotorparametersandparameterchangesdonotaffecttheaccuracyofdirectionalcoordinatesoftheoffsetcausedbyaproblemwhichhasnotreallysolvetheproblemathomeandabroad,sotherotorparameteridentificationandparameterchangesforthefutureoftheadaptivecontrolofthecriticalstudyofvectorcontrolissues.Inrecentyears,donotrelyontheelectricalmodeloffuzzyself-optimizingcontrol,suchasartificialneuralnetworkintelligentcontrolmethodhasbeenintroducedtotheACDrivesystem,asagovernortocontroltheexchangetheory,controltechnologyresearchanddevelopmentofnewdirections.DirectTorqueControltechnologypracticeintheapplicationofcontinuousimprovementandupgradingofthemaindirectionofitsresearchtoaddresslowspeedmotorfluxparametersontheimpactoftrajectorytofurtherimprovethecontroloflowspeedperformance,thescopeoftheexpansionspeed.Cancellationthroughthemechanicalconnectionofthetachometergeneratorandothergunsensor,Speedsensorhardwarerealizationofaspeedcontrolsystemoftheexchangeoftheirownapplications,buttheaccuracyandspeedoftheprojectedreal-timecontroltobefurtherin-depthresearchanddevelopment.1.2.2PWMmodetoimprovethestudyandoptimizationInrecentyears,withtheemergenceofmedium-voltageinverter,thevoltagespacevectorPWMcontrolmodetoimproveandoptimizetheresearch,whichtoresolvethethree-levelmediumvoltageinvertermidpointvoltageoffsetissues,studiedthesynthesisofvoltagevectorPWMmode(nooffsetvoltageatthemidpointofthelongvectorandshortvector,acombinationofzero-vector),hasbeenmadewithresearchresultsofpracticalvalueformulti-levelcascadeinvertervoltagepulsephase-shiftPWMtechniqueownapplication.Mediumvoltagefrequencyconverter1.2.3ResearchandDevelopmentMediumvoltagereferstovoltagelevelsforthe230010000V,inhigh-powermeansthepowerlevelinmorethan300kW.Mediumvoltage,high-capacityresearchanddevelopmentofACDriveSystemhasbeeninpracticeformorethan20yearshavegraduallyembarkedonthepracticalapplicationstage,inparticular,high-pressurefull-controlledpowerdeviceshavebeenintheapplicationofpressuretransducerrapidlyaccelerated.Amongthem,thecurrentapplicationismoreIGBT,IGCTmediumvoltagethree-levelcascadeinverterandmulti-levelmediumvoltageTransformer.Todaysmulti-levelmediumvoltageACinverterspeedcontrolhasbecomeanewfieldofstudyisoneofhottopicsinthepressuretransducerandthedirectionoffuturedevelopmentofresearchtopicsare:(1)technicalaspectsofsafetydevicesareinseriespowerdevicetechnology,triggeringtechnology,isolationtechnology,insulationtechnology,theprotectionoftechnology,remotecontrolandcommunicationtechnology,electromagneticcompatibility,harmonicsuppressiontechnology.(2)controltechnologieswillbethevectorcontroltechnology,theintroductionofdirecttorquecontrolofpressuretransducertechnology,aswellasresearchanddevelopmentformediumvoltagePWMinvertertechnology.(3)thedevelopmentofmediumvoltagefrequencyconverterbythevoltagelevelofpowerelectronicdevicesarenotrestricted.Atpresent,theUnitedStatesCreeInc.,GermanysSiemens,Toshiba,aswellasEuropeancompaniessuchasABBmoneyintothedevelopmentofasiliconcarbide(Sic)powerelectronicdevices,thePNjunctionvoltageupto10kVlevelandaboveisexpectedthenext10years,SiCdeviceswillbeabreakthroughinthedevelopmentofanewgenerationofmediumvoltagefrequencyconvertertothebirthattendant.ThinkingofvectorcontroltechnologyMathematicalmodelofasynchronousmotorisahigh-end,non-linear,strong-couplingmulti-variablesystem,throughthecoordinatetransformationthatallowstheReductionandsimplification,butdidnotchangeitsnon-linear,multi-variablenature.ACDriveSystemdynamicperformancewaslessthandesirable,difficulttoadjustdesignparameters,thekeyisthelinearapproximationisonlysingle-variablecontrolsystemtotheneglectofnon-linear,multi-variableinnature.Manyexpertsandscholarshaveconductedresearchwithgreatconcentration,andfinallysucceeded.70sfromthe20thcentury,GermanengineerscreatedanewcontroltheoryofvectorcontrolinordertoachievetheinductionmotorandDCwiththesameeffectofagoodgovernor.Vectorcontrolisahighperformanceinductionmotorcontrolmethod,whichisbasedondynamicmathematicalmodelofthemotor,throughthecoordinatetransformation,themodelwillbeconvertedtoACmotorDCmotormodel.Basedoninductionmotordynamicmathematicalequation,ithasaDCmotorandthedynamicequationoftheformofthesame,soifyouselectanappropriatecontrolstrategy,inductionmotorsandDCmotorshouldbesimilartothecontrolperformance,andthisistheideaofvectorcontrol.Transformbecauseofthecurrentspacevector,therefore,beachievedthroughthecoordinatetransformationiscalledvectorcontrolsystemcontrolsystemtransformation(TranvectorControlSystem),orvectorcontrolsystem(VectorControlSystem).Simplyput,vectorcontrolistodecouplefluxandtorque,respectively,infavorofthedesignofthetworegulatorstoachievehigh-performanceACmotorspeedcontrol.Vectorcontrolandslipfrequencycontrolbasedonvectorcontrol,sensorlessvectorcontrolmodeandspeedsensorlessvectorcontrolmode.Thiscanbeathree-phaseinductionmotorequivalenttoDCmotorcontrol,whichwasthesamewiththeDCdrivesystemofthestaticanddynamicperformance.VectorcontrolalgorithmhasbeenwidelyusedinSIEMENS,AB,GE,FUJIinternationalcompanies,suchastheinverter.VectorcontrolusingacommonfrequencyconvertercannotonlyscopeinthespeedDCmotorwiththematch,andcancontrolthetorquegeneratedbyinductionmotor.Asaresultofthemannerinwhichvectorcontrolisbasedonthepreciseparametersofinductionmotorwascharged,andsomegeneral-purposeinverterisrequiredintheuseofaccurateinputparametersforinductionmotors,andsomegeneral-purposeinverterneedtousethespeedsensorandencoder.Inviewoftheelectricalparametersmaychange,willaffectthefrequencyconverterofmotorcontrolperformance,thenewcurrentvectorcontrolinverte
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 基于“脾藏意”和Treg细胞外泌体研究补中益气汤改善AIT认知损伤机制
- 硅溶胶-苯丙乳液复合涂层钢筋性能研究
- 班级一日常规管理
- 慢喉痹病护理
- 幼儿园托班健康管理要点
- 大健康连锁店商业计划书
- 2025年黑龙江省绥化市中考招生考试数学真题试卷(真题+答案)
- 预防职业病课件
- 预防接种知识课堂课件
- 《电子产品制造技术》课件-第3章 电子产品焊接工艺
- 国家职业标准 -碳排放管理员
- 党支部书记培训考试题及答案
- GB/T 9144-2025普通螺纹优选系列
- 【物化生 山东卷】2025年山东省高考招生统一考试高考真题物理+化学+生物试卷(真题+答案)
- 肛周良性疾病诊疗要点
- 乡镇农村公墓管理制度
- 2025年1月辽宁省普通高中学业水平合格性考试生物试题(原卷版)
- 二年级下二升三数学暑假作业(北师大)
- 2025上海农商银行校园招聘笔试历年典型考题及考点剖析附带答案详解
- 电梯安全风险管控清单
- 高支模木模板的选材与加工
评论
0/150
提交评论