外文翻译--电牵引采煤机的开关磁阻电动机.doc

中国矿业大学2008届毕业设计第1页英文原文SwitchedReluctanceMotorsDrivefortheElectricalTractioninShearerH.ChenCollegeofInformationandElectricalEngineeringChinaUniversityofMining&Technology,Xuzhou221008,CAbstractThepaperpresentedthedoubleSwitchedReluctancemotorsparalleldrivesystemfortheelectricaltractioninshearer.Thesystemcomponents,suchastheSwitchedReluctancemotor,themaincircuitofthepowerconverterandthecontroller,weredescribed.Thecontrolstrategiesoftheclosed-looprotorspeedcontrolwithPIalgorithmandbalancingthedistributionoftheloadswithfuzzylogicalgorithmweregiven.Thetestsresultswerealsopresented.ItisshownthattherelativedeviationoftheaverageDCsuppliedcurrentofthepowerconverterintheSwitchedReluctancemotor1andintheSwitchedReluctancemotor2iswithin10%Keywords-switchedreluctance；motorcontrol；shearer；coalmine；electricaldriveI.INTRODUCTIONTheundergroundsurroundingsofthecoalminesareveryexecrable.Oneside,itisthemoist,highdustandinflammablesurroundings.Ontheotherside,thespaceofroadwayislimitedsinceitisnecessarytosavetheinvestmentofexploitingcoalminessothatitisdifficulttomaintaintheequipments.Inthemoderncoalmines,theautomatizationequipmentscouldbeusedwidely.Thefaultsoftheautomatizationequipmentscouldaffecttheproductionandthebenefitofthecoalmines.Thesheareristheminingequipmentthatcoalcouldbecutfromthecoalwall.Thetraditionalshearerwasdrivenbythehydrostatictransmissionsystem.Thefaultratioofthehydrostatictransmissionsystemishighsincethefluidinhydrostatictransmissionsystemcouldbepollutedeasily.Thefaultsofthehydrostatictransmissionsystemcouldaffecttheproductionandthebenefitofthecoalminesdirectly.Thefaultratioofthemotordrivesystemislowerthanthatofthehydrostatictransmissionsystem,butitisdifficulttocoolthemotordrivesystemincoalminessincethemotordrivesystemshouldbeinstalledwithintheflameproofenclosureforsafetyprotection.Themotordrivesystemisalsooneofthepivotalpartsintheautomatizationequipments.Thedevelopmentofthenoveltypesofthemotordrivesystemhadbeenattached中国矿业大学2008届毕业设计第2页importancetobythecoalmines.TheSwitchedReluctancemotordrivecouldbecomethemainequipmentsforadjustablespeedelectricaldrivesystemincoalmines1,becauseithasthehighoperationalreliabilityandthefaulttolerantability2.TheSwitchedReluctancemotordrivemadeupofthedouble-salientpoleSwitchedReluctancemotor,theunipolarpowerconverterandthecontrollerisfirminthemotorandinthepowerconverter.Thereisnobrushstructureinthemotorandnofaultofambipolarpowerconverterinthepowerconverter34.TheSwitchedReluctancemotordrivecouldbeoperatedattheconditionoflackedphasesfaultdependedontheindependenceofeachphaseinthemotorandthepowerconverter5.Thereisnowindingintherotorsothatthereisnocopperlossinthelossandthereisonlylittleironlossintherotor.Itiseasytocoolthemotorsinceitisnotnecessarytocooltherotor.TheshearerdrivenbytheSwitchedReluctancemotordrivehadbeendeveloped.Thepaperpresentedthedevelopedprototype.II.SYSTEMCOMPONENTSThedevelopedSwitchedReluctancemotorsdrivefortheelectricaltractioninshearerisatypeofthedoubleSwitchedReluctancemotorsparalleldrivesystem.ThesystemismadeupoftwoSwitchedReluctancemotors,acontrolboxinstalledthepowerconverterandthecontroller.TheadoptedtwoSwitchedReluctancemotorsareallthree-phase12/8structureSwitchedReluctancemotor,whichwereshowninFigure1.ThetwoSwitchedReluctancemotorswerepackingbytheexplosion-proofenclosure,respectively.Theratedoutputpowerofonemotoris40KWattherotorspeed1155r/min,andtheadjustablespeedrangeisfrom100r/minto1500r/min.中国矿业大学2008届毕业设计第3页Figure1.Photographofthetwothree-phase12/8structureSwitchedReluctancemotorThepowerconverterconsistsoftwothree-phaseasymmetricbridgepowerconverterinparallel.TheIGBTswereusedasthemainswitches.Three-phase380VACpowersourcewasrectificatedandsuppliedtothepowerconverter.ThemaincircuitofthepowerconverterwasshowninFigure2中国矿业大学2008届毕业设计第4页Figure2.Maincircuitofthepowerconverter.Inthecontroller,thereweretherotorpositiondetectioncircuit,thecommutationcircuit,thecurrentandvoltageprotectioncircuit,themainswitchesgatedrivercircuitandthedigitalcontrollerforrotorspeedclosed-loopandbalancingthedistributionoftheloads.III.CONTROLSTRATEGYThetwoSwitchedReluctancemotorcouldalldrivetheshearerbythetransmissionoutfitinthesametractionguidewaysothattherotorspeedofthetwoSwitchedReluctancemotorscouldbesynchronized.Theclosed-looprotorspeedcontrolofthedoubleSwitchedReluctancemotorsparalleldrivesystemcouldbeimplementedbyPIalgorithm.IntheSwitchedReluctancemotor1,thetriggeredsignalsofthemainswitchesinthepowerconverteraremodulatedbyPWMsignal,thecomparisonofthegivenrotorspeedandthepracticalrotorspeedaremadeandthedutyratioofPWMsignalareregulatedasfollows,where,isthegivenrotorspeed,isthepracticalrotorspeed,isthedifferenceoftherotorspeed,istheincrementofthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,istheintegralcoefficient,istheproportioncoefficient,ekisthedifferenceoftherotorspeedatktime,ek-1isthedifferenceoftherotorspeedatk-1time,D1(k)isthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,andD1(k-1)isthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atk-1time.TheoutputpoweroftheSwitchedReluctancemotordrivesystemisapproximatelyinproportiontotheaverageDCsupplie