双闭环直流晶闸管调速系统设计[1]VIP免费

西华大学课程设计报告双闭环直流晶闸管调速系统设计摘要：电力拖动自动控制系统是把电能转换成机械能的装置，它被广泛地应用于一般生产机械需要动力的场合，也被广泛应用于精密机械等需要高性能电气传动的设备中，用以控制位置、速度、加速度、压力、张力和转矩等。本文所论述的是“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，此设计利用晶闸管、二极管等器件设计了一个转速、电流双闭环直流晶闸管调速系统。该系统中设置了电流检测环节、电流调节器以及转速检测环节、转速调节器，构成了电流环和转速环，前者通过电流元件的反馈作用稳定电流，后者通过转速检测元件的反馈作用保持转速稳定，最终消除转速偏差，从而使系统达到调节电流和转速的目的。该系统起动时，转速外环饱和不起作用，电流内环起主要作用，调节起动电流保持最大值，使转速线性变化，迅速达到给定值；稳态运行时，转速负反馈外环起主要作用，使转速随转速给定电压的变化而变化，电流内环跟随转速外环调节电机的电枢电流以平衡负载电流。并通过Simulink进行系统的数学建模和系统仿真，分析双闭环直流调速系统的特性。关键词：双闭环，晶闸管，转速调节器，电流调节器，SimulinkAbstract:Theelectricdriveautomaticcontrolsystemistransformstheelectricalenergythemechanicalenergytheinstallment,itwidelyisappliedinproducesthemachinerytoneedgenerallythepowerthesituation,isalsowidelyappliedintheprecisionmachineryandsoonneedsthehighperformanceelectricdriveintheequipment,withcontrolstheposition,thespeed,theacceleration,thepressure,thetensityandthetorqueandsoon.Whatthisarticleelaboratesis“therotationalspeed,theelectriccurrentdoubleclosedloopcocurrentvelocitymodulationsystemrephrasesinownwordsthesingleclosedloopcocurrentvelocitymodulationsystem'smaincircuitdesignandtheresearch”.Themaincircuitdesignisrestsonthethyristor-electricmotor(V-M)thesystemcompositionThedesignusesthyristors,diodesandotherdevicesdesignsaspeed,currentdouble-loopSCRDCconvertersystem.Thesystemsetsupthecurrentdetectingaspect,thecurrentregulatorACRandthespeeddetectinglink,speedregulatorASR,composesthecurrentcentralandthespeedcentral,theformerthroughthefeedbackofthecurrentcomponentstoleveloffthecurrent,thelatterthroughthefeedbackofspeeddetectingdevicetomaintainthespeedstablyandfinallyeliminatesthedeviationofspeedbias.，thusallowingthesystemtothepurposeofregulatingthecurrentandspeed.whenthesystemstarts,thespeedouterringsaturatsnon-functional,thecurrentinnerringplaysamajorroletoregulatethestartingcurrenttomaintainthemaximumsothatthespeedlinearchange,toreachagivenvalue;whenitoperatessteadily,thespeednegative西华大学课程设计报告feedbackfromtheouterringplaysamajorrole,toletthespeedchangeswiththegivenspeedvoltage,atthesametimethecurrentinnerringregulatesthearmaturecurrentofmotoradjustmenttobalancetheloadcurrent.Simulinkforsystemthroughmathematicalmodelingandsystemsimulation.Finallydisplaycontrolsystemmodelandtheresultsofanti-truth.Keywords:Double-loop,thyristors,thespeedregulator,thecurrentregulator，Simulink第2页西华大学课程设计报告目录1前言..................................................................................................................12总体方案设计..................................................................................................22.1方案比较...........................................................................................................22.2方案论证...............................................................................