機電傳動控制考試題庫河南理工大學

1、Indertoensurenmalteachingderprotectingstudentshealthygrowthensuringthatnational(property)isnotlosttopreventminimizetheoccurrenceofsafetyaccidentsfollowthe“preventrescueeachotherensuresafetyreducelosses“principleaccdingto

2、thelocalconditionsmakethemanagementsystem.1theprincipalistheresponsibilityofschoolsafetyschoolsecurityundertheleadershipofPresidentsecuritywkleadinggroup.Theheadteachertotheleadershipteamisresponsiblefimplementationofthe

3、accountabilitysystem.2schoolmonthlystudentknowledgeaboutsafetyeducationeducationshouldbediversifiedinthefmeverysafetyeducationfstudentsofclassesperweekshouldbetargeted.TocarryonemergencyissuesdealingwitheducationinGenera

4、lselfhelpmutualrescueknowledge.Emergencycalls(suchas110119122120soon)usecommonsenseineducation.3theestablishmentofmajaccidentreptingsystem.Schoolstudentsreptmajaccidentwithinanhourofeducationstudentrundisappearancestorep

5、treptoftheaccidenttoawrittenreptintriplicateacrectionalcentreapolicestationatownshippeoplesGovernmentshallnotconcealtheaccident.4weekteachersareondutysystemestablishimprovetheleadershipvaluesstrengthentheeducationmanagem

6、entofteachingactivitiesinschoolstoensurenmalteachingderresponsiblefschoolsafetyleadershipalwaysmaintainedclosecontactdistrictpolicestationscanvassingsupptfromthepolicestationonschoolsafetyhelp.5strengtheningteachersmaled

7、ucationestablishadedicatedloveimprovingeducationqualityobservethestudentspsychologicalchangesatanytimetakepreventivemeasuresnocpalpunishmentcovertcpalpunishmentonstudentsstudentoutoftheclassroomschoolsmaynotbe.6unitsdepa

8、rtmentsusestudentStreetpropagaparticipateinthecelebrationsaswellasparticipatinginothersocialwkwithoutapprovaloftheCrectionalCentreschoolprincipalsconsentwithoutganization.Withouttheapprovalofrelevantdepartmentsmayganizes

9、tudentstoparticipateinfirefightingdisasterreliefsoon.7schoolsshouldeducatestudentstoobeytheschoolrulesregulationsontimeontimehometopreventaccidents.8schooltoschoolinspectionsonaregularbasisfoundhiddenintimeinseverecasesi

10、tishardtoeliminateimmediatelyclosedreptedtothelocalpeoplesGovernmenteducationruleoflawsection.9theschoolshouldalwayschecktheinternalwallsretainingwallspondsrailingshrailsdosWindowsstaircasesavarietyofsptsextracurriculara

11、ctivitiesfacilitiessuchasfiresafetyinfrastructuresecurityunsafefacilitytoimmediatelyrepairdemolitiontoensurethatteachersstudentswklearnlivevenuesfacilitiesaresafereliable.SongLinXiangLiuJiapingelementaryschoolMarch2016so

12、ngLinXiangLiuJiapingprimaryschoolfiresafetysystemstoenhancefiresafetyprotectionofpublicpropertythelifepropertysafetyofteachersstudentsschoolfiresafetyintodaytodaymanagementisdevelopingthefollowingfiresafetysystem.1streng

13、thenfiresafetyeducationofthewholeschool.AccdingtotherequirementsoftheFireServicesActsothateveryonehasofkeepingfirecontrolsafetyprotectingfirecontrolfacilitiesfirepreventionreptsoffireElectricitylinesequipmentinspectionsf

14、oundhiddenintimefrectificationmaintenancesecurity.9donotuseanopenflameintheclassroomprohibitburningstovelitclesmosquitorepellentnosmokingbanningmessywiring.Withoutusinganyhouseholdappliancesisnotallowed.10liveoncampusfac

15、ultymembersmustleadbyexampleeducatefamilieschildrenreadytofire.11householduseofgasinschoolstomasterproperusagepayattentiontotheleakproofexplosionprooffireproofclosingvalveafterusetoensuresecurity.12diningroommustbequalif

16、iedannualtestingofpressurevesselstoregularlycheckthecanteenwkersmustbecertifiedstrictlybyoperationoperationgastankstovesafetydistanceof1.5meterstopreventaccidents.13theadverseconsequencescausedbyigningfiresafetyregulatio

17、nswillbepunisheduntilinvestigatedflegalresponsibility.SongLinXiangLiuJiapingelementaryschoolMarch2016XiangLiuJiapingelementaryschoolpineslopessurroundingsafetymanagementsystem1teachersstudentsthesurroundingareaoftheschoo

18、lgovernancecoverspersonalfoodhygieneculturaleventsotheraspectsintegratedgovernanceshallobtainwidesupptfullcooperationofthecommunity.Onthesurroundingenvironmentinschoolsshouldbecloselymonited.2schoolwkatthesametimeshouldp

19、ayattentiontothesafetymanagementofschoolenvironmentshouldtaketheinitiativetocontactthedistrictpolicestationthevillageCommitteeCrectionalCentreTownshipgovernmentbusinessmanagementotherdepartmentstodoagoodjobmanagement.3te

20、acherondutywiththeexceptionofinspectionsinschoolsshouldalsopayattentiontoenvironmentalinspectionsnearthecampusfoundthatthejoblessmigrantsfromruralareasfexampleharassmentofstudentsavarietyofaccidentsaccdingtodifferentsitu

21、ationsreptedschoolofficialsthepolicestationinatimelymannertoprotectthesafetyofstudents.4everydaybefeschoolteachersremindstudentspayattentiontotrafficsafety.5shouldeducatestudentstorespectsocialethicsvariousregulationsmai

22、ntainingpublicderfightthebadguysgraspthecrectwaysmeansofmaintainingimprovingstudentsselfcareability.6theestablishmentofemergencyrescueteamsofteachersinschoolsonhighalertdeployed.SongLinXiangLiuJiapingelementaryschoolMarc

23、h2016songLinXiangLiuJiapingprimaryschoolteachersstudentsganizationsoutofsafetymanagementsystemganizationactivitiesbetweenteachersstudentstodrawupapreciseplansecuritymeasuresmustbesignedbytheschoolofficialstoreviewtheprog

24、rammeofactivitiesagreeduponCrectionalCenteragreedtoimplement.ganizationtothefieldrelativelyfaractivitiesrequireapprovalbytheDeputyDirectoftheEducationBureauingeofsecurity.2eachactivityshouldhaveaspecificresponsibilitypay

25、attentiontothepersonsagephysicalmatch.Route3activitieslocationfieldsurveysshouldbecarriedoutinadvance.4activitiesfthemeansoftransptshouldexplainthesituationtotheschooltocomplywithvehiclesafetyrequirementsbefethelinefrepa

26、irs.5eachactivitymusthavesecurityemergencyresponseplanfaccidents.6picnicshikingpicnictopayattentiontofirepreventionfoodpoisoningpreventionoffallaccidents7theactivitiesneartheriversreservoirsnomeasuresdonotmeetthesecurity

27、requirementsoftheganizationnotletstudentsintothewater一、一、問答題（回答要點，并簡明扼要作解釋。每小題問答題（回答要點，并簡明扼要作解釋。每小題4分，共分，共20分）分）1有一臺三相異步電動機，正常運行時為△接法，在額定電壓有一臺三相異步電動機，正常運行時為△接法，在額定電壓UN下啟動時，其啟下啟動時，其啟動轉矩動轉矩Tst=1.2TN(TN為額定轉矩為額定轉矩)，若采用，若采用Y△

28、換接啟動，試問當負載轉矩△換接啟動，試問當負載轉矩TL=35%TN時，電動機能否啟動？為什么？時，電動機能否啟動？為什么？采用Y△換接啟動時，啟動轉矩故LNNNststYTTTTTT???????35.04.02.13131能夠啟動。2試說明下圖中幾種情況下系統(tǒng)的運行狀態(tài)是加速？減速？還是勻速？（圖中箭頭試說明下圖中幾種情況下系統(tǒng)的運行狀態(tài)是加速？減速？還是勻速？（圖中箭頭方向為轉矩的實際作用方向）方向為轉矩的實際作用方向）圖（a）所示

29、為加速圖（b）所示為減速圖（c）所示為減速圖（d）所示為減速3對電動機的啟動轉矩有哪些主要要求？對電動機的啟動轉矩有哪些主要要求？啟動轉矩大，電流小，平滑，安全可靠，簡單方便，功耗小4直流他勵電動機啟動時，若加上勵磁電流前就把電樞電壓加上，這時會產生什么直流他勵電動機啟動時，若加上勵磁電流前就把電樞電壓加上，這時會產生什么后果（試從后果（試從TL=0和TL=TN兩種情況加以說明）？兩種情況加以說明）？TL=0時飛車，TL=TN時電樞電流

30、很大。5單相異步電動機為什么沒有啟動轉矩？常采用哪些方法啟動？單相異步電動機為什么沒有啟動轉矩？常采用哪些方法啟動？因為單相交流電產生脈動磁場，不產生旋轉磁場，所以，常采用電容分相式和0?stT罩極式兩種啟動方法。6電流截止負反饋的作用是什么？試畫出其轉速特性電流截止負反饋的作用是什么？試畫出其轉速特性n=f(Ia)，并加以說明；轉折點，并加以說明；轉折點電流電流I0，堵轉電流，堵轉電流Ia0，比較電壓，比較電壓Ub如何選？如何選？作用

31、是當電動機嚴重過載時，人為地造成“堵轉”，防止電樞電流過大而燒壞電動機。轉速特性如圖所示。I0以前為穩(wěn)定運行的硬特性區(qū)；I0以后為軟特性，n迅速下降，而Indertoensurenmalteachingderprotectingstudentshealthygrowthensuringthatnational(property)isnotlosttopreventminimizetheoccurrenceofsafetyaccident

32、sfollowthe“preventrescueeachotherensuresafetyreducelosses“principleaccdingtothelocalconditionsmakethemanagementsystem.1theprincipalistheresponsibilityofschoolsafetyschoolsecurityundertheleadershipofPresidentsecuritywklea

33、dinggroup.Theheadteachertotheleadershipteamisresponsiblefimplementationoftheaccountabilitysystem.2schoolmonthlystudentknowledgeaboutsafetyeducationeducationshouldbediversifiedinthefmeverysafetyeducationfstudentsofclasses

34、perweekshouldbetargeted.TocarryonemergencyissuesdealingwitheducationinGeneralselfhelpmutualrescueknowledge.Emergencycalls(suchas110119122120soon)usecommonsenseineducation.3theestablishmentofmajaccidentreptingsystem.Schoo

35、lstudentsreptmajaccidentwithinanhourofeducationstudentrundisappearancestoreptreptoftheaccidenttoawrittenreptintriplicateacrectionalcentreapolicestationatownshippeoplesGovernmentshallnotconcealtheaccident.4weekteachersare

36、ondutysystemestablishimprovetheleadershipvaluesstrengthentheeducationmanagementofteachingactivitiesinschoolstoensurenmalteachingderresponsiblefschoolsafetyleadershipalwaysmaintainedclosecontactdistrictpolicestationscanva

37、ssingsupptfromthepolicestationonschoolsafetyhelp.5strengtheningteachersmaleducationestablishadedicatedloveimprovingeducationqualityobservethestudentspsychologicalchangesatanytimetakepreventivemeasuresnocpalpunishmentcove

38、rtcpalpunishmentonstudentsstudentoutoftheclassroomschoolsmaynotbe.6unitsdepartmentsusestudentStreetpropagaparticipateinthecelebrationsaswellasparticipatinginothersocialwkwithoutapprovaloftheCrectionalCentreschoolprincipa

39、lsconsentwithoutganization.Withouttheapprovalofrelevantdepartmentsmayganizestudentstoparticipateinfirefightingdisasterreliefsoon.7schoolsshouldeducatestudentstoobeytheschoolrulesregulationsontimeontimehometopreventaccide

40、nts.8schooltoschoolinspectionsonaregularbasisfoundhiddenintimeinseverecasesitishardtoeliminateimmediatelyclosedreptedtothelocalpeoplesGovernmenteducationruleoflawsection.9theschoolshouldalwayschecktheinternalwallsretaini

41、ngwallspondsrailingshrailsdosWindowsstaircasesavarietyofsptsextracurricularactivitiesfacilitiessuchasfiresafetyinfrastructuresecurityunsafefacilitytoimmediatelyrepairdemolitiontoensurethatteachersstudentswklearnlivevenue

42、sfacilitiesaresafereliable.SongLinXiangLiuJiapingelementaryschoolMarch2016songLinXiangLiuJiapingprimaryschoolfiresafetysystemstoenhancefiresafetyprotectionofpublicpropertythelifepropertysafetyofteachersstudentsschoolfire

43、safetyintodaytodaymanagementisdevelopingthefollowingfiresafetysystem.1strengthenfiresafetyeducationofthewholeschool.AccdingtotherequirementsoftheFireServicesActsothateveryonehasofkeepingfirecontrolsafetyprotectingfirecon

44、trolfacilitiesfirepreventionreptsoffireElectricitylinesequipmentinspectionsfoundhiddenintimefrectificationmaintenancesecurity.9donotuseanopenflameintheclassroomprohibitburningstovelitclesmosquitorepellentnosmokingbanning

45、messywiring.Withoutusinganyhouseholdappliancesisnotallowed.10liveoncampusfacultymembersmustleadbyexampleeducatefamilieschildrenreadytofire.11householduseofgasinschoolstomasterproperusagepayattentiontotheleakproofexplosio

46、nprooffireproofclosingvalveafterusetoensuresecurity.12diningroommustbequalifiedannualtestingofpressurevesselstoregularlycheckthecanteenwkersmustbecertifiedstrictlybyoperationoperationgastankstovesafetydistanceof1.5meters

47、topreventaccidents.13theadverseconsequencescausedbyigningfiresafetyregulationswillbepunisheduntilinvestigatedflegalresponsibility.SongLinXiangLiuJiapingelementaryschoolMarch2016XiangLiuJiapingelementaryschoolpineslopessu

48、rroundingsafetymanagementsystem1teachersstudentsthesurroundingareaoftheschoolgovernancecoverspersonalfoodhygieneculturaleventsotheraspectsintegratedgovernanceshallobtainwidesupptfullcooperationofthecommunity.Onthesurroun

49、dingenvironmentinschoolsshouldbecloselymonited.2schoolwkatthesametimeshouldpayattentiontothesafetymanagementofschoolenvironmentshouldtaketheinitiativetocontactthedistrictpolicestationthevillageCommitteeCrectionalCentreTo

50、wnshipgovernmentbusinessmanagementotherdepartmentstodoagoodjobmanagement.3teacherondutywiththeexceptionofinspectionsinschoolsshouldalsopayattentiontoenvironmentalinspectionsnearthecampusfoundthatthejoblessmigrantsfromrur

51、alareasfexampleharassmentofstudentsavarietyofaccidentsaccdingtodifferentsituationsreptedschoolofficialsthepolicestationinatimelymannertoprotectthesafetyofstudents.4everydaybefeschoolteachersremindstudentspayattentiontotr

52、afficsafety.5shouldeducatestudentstorespectsocialethicsvariousregulationsmaintainingpublicderfightthebadguysgraspthecrectwaysmeansofmaintainingimprovingstudentsselfcareability.6theestablishmentofemergencyrescueteamsoftea

53、chersinschoolsonhighalertdeployed.SongLinXiangLiuJiapingelementaryschoolMarch2016songLinXiangLiuJiapingprimaryschoolteachersstudentsganizationsoutofsafetymanagementsystemganizationactivitiesbetweenteachersstudentstodrawu

54、papreciseplansecuritymeasuresmustbesignedbytheschoolofficialstoreviewtheprogrammeofactivitiesagreeduponCrectionalCenteragreedtoimplement.ganizationtothefieldrelativelyfaractivitiesrequireapprovalbytheDeputyDirectoftheEdu