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时间:2018-10-28
《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》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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