双闭环直流调速系统的说明大学毕业论文外文文献翻译及原文

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1、毕业i殳计（论文）外文文献翻译文献、资料中文题目：双闭环直流调速系统的说明文献、资料英文题目：DoubleLoopDCSpeedControlSystemDescription文献、资料来源：文献、资料发表（出版）日期:院（部）：专业：班级：姓名：学号：指导教师:翻译日期:2017.02.14DoubleLoopDCSpeedControlSystemDescriptionI.systemanalysisandsynthesis1•Analysis(1)Inthespeedandcurrentdualclosed-loopspeedcontrolsyst

2、em，inordertochangethemotorspeed，whatparametersshouldberegulating?ChangespeedregulatorKnmagnificationwork?PowerelectronicconvertertochangethemagnificationfactorKswork?Changethespeedofthefeedbackcoefficientofwork?Tochangethemotor’sstallcurrentsystemshouldadjusttheparametersofwhat?A

3、:Tochangethemotorspeed，changespeedregulatorKnmagnificationandpowerelectronicconverterswillnotworkmagnificationfactorKs，stablewhenn=Un=Un*，sotheonlychangeinthevalueofagivencoefficientofUn*andfeedbackbefore.Tochangethemotor’sstallcurrent，onlyneedtochangethesamevaluegivenUim*andfeed

4、backcoefficient,becausethestability，Uim*=Idm，canbedrawnfromthetype(2)Speed,thecurrentdoubleclosed-loopspeedcontrolsystemwhenthesteady-stateoperation，thetworegulatorinputvoltageandoutputvoltagedeviationisthenumber?A:Thespeedandcurrentdualclosed-loopspeedcontrolsystemwhenthesteady-

5、stateoperation，thetworegulatorsaretheinputbiasvoltageiszero,bytheformulan=Un=Un*，n=n;Uim*=Idm，Idm=Idl.(3)Inthespeedandcurrentdualclosed-loopspeedcontrolsystem,thetworegulatorsarePIregulator.Whenthesystemisrunningwithratedload，thespeedfeedbacklinesuddenlydisconnected，thesystemrc-c

6、ntcrthesteady-state,thecurrentregulatoristheinputbiasvoltagetozero?Why?A:Whenthesystemisrunningwithratedload，thespeedfeedbacklinesuddenlydisconnected，thenUn=0，=Un*-Un=Un*，sothatUitoreachUim,0，rateofincreaseinn，whenthesystemafterre-enteringthesteady-state，thatis，Id=Idl,then,=Uim*-

7、Idl0,arenolongerchanges，changesinrotationalspeednisnolonger,butatthistimethantherotationalspeednatthetimeofthefeedbacklinespeedtobreakbig.(4)Whyisthespeedwithintegralcontrolsystemisnotstaticpoor?A:Speedregulatorintegralsystem,toachievenon-staticerrorisduetothecharacteristicsofint

8、egralcontrolregulator，thatis，theaccumula