运动控制系统转速电流双闭环VM直流调速系统.doc

运动控制系统课程设计目:转速、电流双闭环V-M直流调速系统题专业班级:号:学名:姓指导教师:成绩:转速电流双闭环直流调速系统Speedandcurrentdoubleclosed-loopV-MDCspeedregulatingsystem学生姓名:指导教师:摘要直流电动机具有良好的起动、制动性能,宜于在大范围内平滑调速,在许多需要调速或快速正反向的电力拖动领域中得到了广泛的应用。从控制的角度来看,直流调速还是交流拖动系统的基础。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;SimulinkIAbstractThedesignusesthyristors,diodesandotherdevicesdesignsaspeed,currentdouble-,thecurrentregulatorACRandthespeeddetectinglink,posesthecurrentcentralandthespeedcentral,ponentstoleveloffthecurrent,thelatterthroughthefeedbackofspeeddetectingdevicetomaintainthespeedstablyandfinallyeliminatesthedeviationofspeedbias.,,thespeedouterringsaturatsnon-functional,thecurrentinnerringplaysamajorroletoregulatethestartingcurrenttomaintainthemaximumsothatthespeedlinearchange,toreachagivenvalue;whenitoperatessteadily,thespeednegativefeedbackfromtheouterringplaysamajorrole,toletthespeedchangeswiththegivenspeedvoltage,-:Double-loop;thyristors,;thespeedregulator;thecurrentregulator;SimulinkII目录摘要..................................................................................................................................................IABSTRACT.........................................................................................................................................II第一章绪论.............................................................................................................................