单片机外文翻译.docx

单片机外文翻译.docx

《单片机外文翻译.docx》由会员分享，可在线阅读，更多相关《单片机外文翻译.docx（15页珍藏版）》请在冰豆网上搜索。

单片机外文翻译

外文文献：

Doubleswitchedreluctancemotorsparalleldrivebasedondual89C52singlechipmicroprocessors

Abstract

ThedevelopeddoubleSwitchedReluctancemotorsparalleldriveispresented,whichismadeupoftwofour-phase8/6structureSwitchedReluctancemotors,twofour-phaseasymmetricbridgepowerconvertersandthecontroller.Thefour-phase8/6structureSwitchedReluctancemotor,thefour-phaseasymmetricbridgepowerconverterandthecontrolschemearedescribed.Theclosed-looprotorspeedcontrolofthemainmotorandtheclosed-looprotorspeedcontrolofthesubroutinemotorcouldbebasedonthepulsewidthmodulationfuzzylogicalgorithm,whichisimplementedbydual89C52singlechipmicroprocessorcontroller.TheexperimentalresultsofrotorspeedsandphasecurrentsintwoSwitchedReluctancemotorsaregiven.

Keywords:

switchedreluctance;fuzzylogic;microprocessor

1.Introduction

Theelectriclocomotivesincoalminesaredrivenbyseriesdirectcurrentmotordrivesystem.Theaccessionalresistorregulatedcontrolorthechoppingcontrolisusedtoadjusttherotorspeedoftheseriesdirectcurrentmotorandtocontrolthespeedofelectriclocomotive.TheSwitchedReluctancemotordrivecanbeoperatedatfourquadrants[1].Itcouldbeusedaselectricaltractionforelectriclocomotivesincoalmines[2][3].ThesoftmechanicalcharacteristicsofSwitchedReluctancemotordrive[4]contributetoparalleldoubleSwitchedReluctancemotordrivessystemwithsynchronizationoftherotorspeedandtheloadsbeinginequilibrium.ThedoubleSwitchedReluctancemotorsparalleldrivesystemcanbeusedtoreplacetheseriesdirectcurrentmotordrivesystemastheadjustablespeedmotordrivefortheelectriclocomotives.TheSwitchedReluctancemotordriveismadeupoftheSwitchedReluctancemotor,thepowerconverterandthedigitalcontroller.Therearefour-phase8/6structureSwitchedReluctancemotorandthree-phase6/4structureSwitchedReluctancemotor.Thefaulttoleranceabilityoffour-phase8/6structureSwitchedReluctancemotorishigherthanthatofthree-phase6/4structureSwitchedReluctancemotorsothatfour-phase8/6structureSwitchedReluctancemotorisadoptedinthesystem.Thereareasymmetricbridgecircuit,bifilarwindingcircuit,commonswitchcircuit,resistancecommutationcircuit,splitsupplycircuit,inductancecommutationcircuitforfour-phasepowerconverterwithfour-phase8/6structureSwitchedReluctancemotor.Thefour-phaseasymmetricbridgepowerconvertercircuitisadoptedinthesystemduetoitsindependenceineachphase.ThedigitalmicroprocessorhastheadvantagesinhighreliabilityandstabilityforcontrolofSwitchedReluctancemotordrive.Somecontrolalgorithmscanbeimplementedbythedigitalmicroprocessor.TheSwitchedReluctancemotordriveisbasedonIntel8031[5],Intel80C196KB[6],Intel87C196KC[7].The89C52digitalmicroprocessorhadbeendevelopedforslidingmodeandPIcontrolofasingleSwitchedReluctancemotordrive[8].Thepaperpresentsdual89C52singlechipmicroprocessorscontrollerfordoubleSwitchedReluctancemotorsparalleldrive.ItisnoteasytogaintheexactmathematicalmodelofSwitchedReluctancemotordrivesinceithasnonlinearmagneticpathsinthemotorandnonlinearcircuittopologyinthepowerconverter.ItisnotnecessaryforthefuzzylogiccontroltogaintheexactmathematicalmodelofSwitchedReluctancemotordrive.Therotorspeedclosed-loopcontrolcouldbeimplementedbasedonthefuzzylogicalgorithm.

2.Schemeofsystem

ThedevelopeddoubleSwitchedReluctancemotorsparalleldriveconsistsoftwofour-phase8/6structureSwitchedReluctancemotors,twofour-phaseasymmetricbridgepowerconvertersandthedigitalcontroller.

1.1.Motor

Twofour-phase8/6structureSwitchedReluctancemotorsareadoptedinthedevelopeddoubleSwitchedReluctancemotorsparalleldrive.Thecrosssectionofthefour-phase8/6structureSwitchedReluctanceisshowninFig.1.Thereareeightpolesinthestator,whilesixpolesintherotor.Thetwocoilsonthediametricallyoppositestatorpolescanbeconnectedtomakeupaphasewinding.Thereisonlyphasewindinginthestator.Thereisnowinding,nomagnetandnobrushintherotor.Thereisarotorpositiondetectoronthemotorfordetectingrotorpositionandspeed.Thephotographofthedevelopeddualfour-phase8/6structureSwitchedReluctancemotorsisshowninFig.2.

Fig1.Crosssectionofthefour-phase8/6structureSRmotor

Fig2.Photographofthedevelopeddualfour-phase8/6structureSRmotors

2.2.Powerconverters

Themaincircuitofthetwofour-phaseasymmetricbridgepowerconverterswithphasewindings,“A1”,“B1”,“C1”and“D1”,“A2”,“B2”,“C2”and“D2”,isshowninFig.3.

2.3.Controlscheme

Theturned-onangleandtheturned-offangleofthemainswitchesarefixed.ThetriggeredsignalsofthemainswitchesinthedualpowerconvertersaremodulatedbyPWMsignal.Theclosed-looprotorspeedcontrolinthemainSwitchedReluctancemotorcouldbeimplementedbycomparisonofthegivenrotorspeedandtherealrotorspeedofmainmotor,andbyregulationofthedutyratioofPWMsignalinmainpowerconverterwithfuzzylogiccontrolalgorithm.Theclosed-looprotorspeedcontrolinthesubroutineSwitchedReluctancemotorcouldbeimplementedbycomparisonoftherealrotorspeedofmainmotorandtherealrotorspeedofsubroutinemotor,andbyregulationofthedutyratioofPWMsignalinsubroutinepowerconverterwithfuzzylogiccontrolalgorithm.Thefuzzylogiccontrolalgorithminan89C52digitalmicroprocessorforthemainmotorcouldbe

（1）

where,thegivenrotorspeedis

andtherealrotorspeedis

thedeviationoftherotorspeedofthemainmotoratthemomentoftiis

.Variationfromthedeviationoftherotorspeedisas

（2）

where,e（i-1）1isthedeviationoftherotorspeedatthemomentofti-1.ThedutyratioofthePWMsignalofthemainmotoratthemomentoftiis

（3）

where,

istheincrementofthedutyratioofthePWMsignalatthemomentoftiand

isthedutyratioofthePWMsignalatthemomentofti-1.Thefuzzylogicalgorithmcouldbeexpressedas

if

and

then

i=1,2,…,m,j=1,2,…,n（4）

where,

isthefuzzysetofthedeviationoftherotorspeed,

isthefuzzysetofthevariationfromthedeviationoftherotorspeed,and

isthefuzzysetoftheincrementofthedutyratioofthepulsewidthmodulationsignal.

Thefuzzylogiccontrolalgorithmintheother89C52digitalmicroprocessorforthesubroutinemotorcouldbeasfollows

（5）

where,therealrotorspeedofthesubroutinemotorisnf2,thedeviationoftherotorspeedofthesubroutinemotoratthemomentoftiisei2.Thevariationfromthedeviationoftherotorspeedisasfollows

（6）

where,e（i-1）2isthedeviationoftherotorspeedatthemomentofti-1.ThedutyratioofthePWMsignalofthemainmotoratthemomentoftiis

（7）

where,

istheincrementofthedutyratioofthePWMsignalatthemomentoftiand

isthedutyratioofthePWMsignalatthemomentofti-1.Thefuzzylogicalgorithmcouldbeexpressedasfollows

if

and

then

i=1,2,…,m,j=1,2,…,n（8）

where,

isthefuzzysetofthedeviationoftherotorspeed,

isthefuzzysetofthevariationfromthedeviationoftherotorspeed,and

isthefuzzysetoftheincrementofthedutyratioofthepulsewidthmodulationsignal.

Theclosed-looprotorspeedcontrolofthemainmotorandtheclosed-looprotorspeedcontrolofthesubroutinemotorcouldbebasedonthepulsewidthmodulationfuzzylogicalgorithm,whichisimplementedbydual89C52singlechipmicroprocessorscontroller.Thephotographofthedevelopeddual89C52singlechipmicroprocessorscontrollerisshowninFig.4.

TheschematicdiagramofthedevelopeddualSwitchedReluctancemotorsparalleldriveprototypeisshowninFig.5.Therearetheprotectioncircuit,thecommutationcircuitandthegatedrivercircuitineachmotordrivesystem,respectively.

3.Experimentaltests

ThedevelopeddualSwitchedReluctancemotorsparalleldriveprototypeissuppliedbyDC132Vstoragebatteries.TheexperimentalresultsintherotorspeedcurvesofthetwomotorsareshowninFig.6.InFig.6a）thegivenrotorspeedng=400r/min,b）thegivenrotorspeedng=750r/min,c）thegivenrotorspeedng=1100r/min.TheexperimentalresultsinthephasecurrentwaveformsofthetwomotorsareshowninFig.7.InFig.7a）thegivenrotorspeedng=400r/min,b）thegivenrotorspeedng=800r/min,c）thegivenrotorspeedng=1040r/min.Itisshownthatsynchronizationoftherotorspeedsofthemotorsiswell.Thedifferenceinthepeakvalueofphasecurrentofthetwomotorsandinphasecurrentwaveformsofthetwomotorsissmall.Itmeansthattheloadsaredistributedonthetwomotorsinequilibrium.

Fig.3.MaincircuitofthepowerconvertersFig.4.Photographofthedevelopeddigitalcontroller

Fig.5.SchematicdiagramofthedevelopeddualSwitchedReluctancemotorsparalleldriveprototype

4.Conclusions

ThesoftmechanicalcharacteristicsofSwitchedReluctancemotordrivecontributetoparalleldualSwitchedReluctancemotorswithsynchronizationoftherotorspeedandtheloadsbeinginequilibrium.Theprototypemadeupoftwofour-phase8/6structureSwitchedReluctancemotors,twofour-phaseasymmetricbridgepowerconvertersandthedigitalcontrollerisdeveloped.Theclosed-looprotorspeedcontrolinthemainSwitchedReluctancemotorandtheclosed-looprotorspeedcontrolinthesubroutineSwitchedReluctancemotorareimplementedbyPWMfuzzylogiccontrolalgorithm,whicharebasedondual89C52dig