电气工程及其自动化-毕业论文

烟台南山学院毕业论文题目基于串极调速的双闭环控制系统姓名：张乘所在学院：自动化学院所学专业：电气工程及其自动化班级：08电气工程（2+2）2班学号：200806909617指导教师：王云彬完成时间：2012年4月2摘要许多生产机械要求在一定的范围内进行速度的平滑调节，并且要求具有良好的稳态、动态性能。而直流调速系统调速范围广、静差率小、稳定性好以及具有良好的动态性能，在高性能的拖动技术领域中，相当长时期内几乎都采用直流电力拖动系统。双闭环直流调速系统是直流调速控制系统中发展得最为成熟，应用非常广泛的电力传动系统。直流双闭环调速系统的性能很好，具有调速范围广、精度高、动态性能好和易于控制等优点，所以在电气传动系统中得到了广泛的应用。直流双闭环调速系统中设置了两个调节器,即转速调节器(ASR)和电流调节器(ACR),分别调节转速和电流。本设计对直流双闭环调速系统的设计进行了分析，对直流双闭环调速系统的原理进行了一些说明介绍了电流调节器和转速调节器的设计以及一些参数的选择和计算，使其满足工程设计参数指标。从直流电动机的工作原理入手，建立双闭环直流调速系统的数学模型，并详细分析系统的工作原理及其静态性能。本设计所论述的是“转速、电流双闭环直流调速系统转述单闭环直流调速系统的主电路设计与研究”。主电路设计是依据晶闸管-电动机（V—M）系统组成，其系统由整流变压器TR、晶闸管整流调速装置、平波电抗器L和电动机-发电机组等组成。整流变压器TR和晶闸管整流调速装置的功能是将输入的交流电整流后变成直流电；平波电抗器L的功能是使输出的直流电流更平滑；电动机-发电机组提供三相交流电源。关键词：主电路整流变压器晶闸管整流调速装置平波电抗器ABSTRACTManyproductionmachineryrequirementsinacertainrangeofspeedregulationforthesmooth,andarerequiredtohavegoodsteady,dynamicperformance.Anddcspeedcontrolsystemwidespeedrange,static,goodstabilityandsmallratedifferentialwithgooddynamicperformance,highperformanceinthedragtechnologyareas,aquitelongperiodofalmostalladoptsdcelectricdrivesystem.Doubleclosedloopdcspeedcontrolsystemofdcmotorcontrolsystemisthemostmaturedevelopment,arewidelyusedinpowertransmissionsystem.Dcdoubleclosedloopspeedregulationsystemperformanceisgood,haswidespeedrange,highaccuracy,gooddynamicperformanceandeasytocontroletc,andsoinelectricaltransmissionsysteminawiderangeofapplications.Dcdoubleclosedloopspeedregulationsystemsetuptworegulator,namelythespeedregulator(ASR)andcurrentregulator(ACR),speed,regulateandcurrent.Inthispaper,thedcdoubleclosedloopspeedregulationsystemdesignbasedontheanalysisofthedcdoubleclosedloopspeedregulationsystemoftheprinciplethatthecurrentregulatorintroducedsomespeedregulatorandthedesignandsomeparameterselectionandcalculation,makeitsmeettheengineeringdesignparameterindex.Fromtheprinciplesofdcmachineswork,setupdoubleclosedloopdcspeedcontrolsystem,andthemathematicalmodelofadetailedanalysisofthesystem,theprincipleandthestaticperformance.Thispaperexpoundsisthespeed,currentdoubleclosedloopdcspeedcontrolsystemsingleclosedloopdcspeedcontrolsystemretoldthecircuitdesignandresearch.Maincircuitdesignisbasedonthyristor-motor(V-M)systemcomposition,thesystembytherectifiertransformerTR,thyristorrectifiercontroldevice,flatwavereactorLandmotor-generatoretc.RectifiertransformerTRandgrainbrakecanalrectifiercontroldeviceisthefunctionoftheinputacafterrectifyingintod;FlatwavereactoristhefunctionofLoutputofthedccurrentsmooth;Motor-generatorforthree-phaseacpower.4目录摘要.................................................................................................................................................2ABSTRACT....................................................................................................................................31前言..............................................................................................................................................51.1课题背景...........................................................................................................................51.2课题现状...........................................................................................................................51.3课题研究内容...................................................................................................................52串极调速系统.............................................................................................................................62.1主电路方案的确定...........................................................................................................62.2系统静态及动态要求.......................................................................................................62.3串极调速原理及基本类型...............................................................................................72.4电动机供电方案的确定...................................................................................................93电动机容量校核........................................................................................................................113.1最大转差率.....................................................................................................................113.2转子整流器的最大输出电压.........................................................................................113.3最大直流整流电流.........................................................................................................123.4最大直流整流电阻.........................................................................................................123.5定子电阻.........................................................................................................................123.6电动机额定转矩.............................................................................................................134硬件元件的选择........................................................................................................................144.1整流二极管的选择.........................................................................................................144.1.1整流二