双闭环直流调速系统设计.docx

双闭环直流晶闸管调速系统设计
摘要：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，Simulink
Abstract:Thedesignusesthyristors,diodesandotherdevicesdesignsaspeed,currentdouble-loopSCRDCconvertersystem.Thesystemsetsupthecurrentdetectingaspect,thecurrentregulatorACRandthespeeddetectinglink,speedregulatorASR,composesthecurrentcentralandthespeedcentral,theformerthroughthefeedbackofthecurrentcomponentstoleveloffthecurrent,thelatterthroughthefeedbackofspeeddetectingdevicetomaintainthespeedstablyandfinallyeliminatesthedeviationofspeedbias.，thusallowingthesystemtothepurposeofregulatingthecurrentandspeed.whenthesystemstarts,thespeedouterringsaturatsnon-functional,thecurrentinnerringplaysamajorroletoregulatethestartingcurrenttomaintainthemaximumsothatthespeedlinearchange,toreachagivenvalue;whenitoperatessteadily,thespeednegativefeedbackfromtheouterringplaysamajorrole,toletthespeedchangeswiththegivenspeedvoltage,atthesametimethecurrentinnerringregulatesthearmaturecurrentofmotoradjustmenttobalancetheloadcurrent.Simulinkforsystemthroughmathematicalmodelingandsystemsimulation.Finallydisplaycontrolsystemmodelandtheresultsofanti-truth.
Keywords:Double-loop,thyristors,thespeedregulator,thecurrentregulator，Simulink

目录
TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc534492275"1前言PAGEREF_Toc534492275\h1
HYPERLINK\l"_Toc534492276"2总体方案设计PAGEREF_Toc534492276\h2
HYPERLINK\l"_Toc534492277"2.1方案比较PAGEREF_Toc534492277\h2
HYPERLINK\l"_Toc534492278"2.2方案论证PAGEREF_Toc534492278\h2
HYPERLINK\l"_Toc534492279"2.3方案选择PAGEREF_Toc534492279\h3
HYPERLINK\l"_Toc534492280"2.4设计要求PAGEREF_Toc534492280\h3
HYPERLINK\l"_Toc534492281"3单元模块设计PAGEREF_Toc534492281\h4
HYPERLINK\l"_Toc534492282"3.1转速给定电路设计PAGEREF_Toc53