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中国矿业大学2008届毕业设计第1页英文原文SwitchedReluctanceMotorsDrivefortheElectricalTractioninShearerH.ChenCollegeofInformationandElectricalEngineeringChinaUniversityofMiningTechnology,Xuzhou221008,Chinachenhaocumttom.comAbstractThepaperpresentedthedoubleSwitchedReluctancemotorsparalleldrivesystemfortheelectricaltractioninshearer.Thesystemcomponents,suchastheSwitchedReluctancemotor,themaincircuitofthepowerconverterandthecontroller,weredescribed.ThecontrolstrategiesoftheclosedlooprotorspeedcontrolwithPIalgorithmandbalancingthedistributionoftheloadswithfuzzylogicalgorithmweregiven.Thetestsresultswerealsopresented.ItisshownthattherelativedeviationoftheaverageDCsuppliedcurrentofthepowerconverterintheSwitchedReluctancemotor1andintheSwitchedReluctancemotor2iswithin±10KeywordsswitchedreluctancemotorcontrolshearercoalmineelectricaldriveI.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.TheSwitchedReluctancemotordrivemadeupofthedoublesalientpoleSwitchedReluctancemotor,theunipolarpowerconverterandthecontrollerisfirminthemotorandinthepowerconverter.Thereisnobrushstructureinthemotorandnofaultofambipolarpowerconverterinthepowerconverter34.TheSwitchedReluctancemotordrivecouldbeoperatedattheconditionoflackedphasesfaultdependedontheindependenceofeachphaseinthemotorandthepowerconverter5.Thereisnowindingintherotorsothatthereisnocopperlossinthelossandthereisonlylittleironlossintherotor.Itiseasytocoolthemotorsinceitisnotnecessarytocooltherotor.TheshearerdrivenbytheSwitchedReluctancemotordrivehadbeendeveloped.Thepaperpresentedthedevelopedprototype.II.SYSTEMCOMPONENTSThedevelopedSwitchedReluctancemotorsdrivefortheelectricaltractioninshearerisatypeofthedoubleSwitchedReluctancemotorsparalleldrivesystem.ThesystemismadeupoftwoSwitchedReluctancemotors,acontrolboxinstalledthepowerconverterandthecontroller.TheadoptedtwoSwitchedReluctancemotorsareallthreephase12/8structureSwitchedReluctancemotor,whichwereshowninFigure1.ThetwoSwitchedReluctancemotorswerepackingbytheexplosionproofenclosure,respectively.Theratedoutputpowerofonemotoris40KWattherotorspeed1155r/min,andtheadjustablespeedrangeisfrom100r/minto1500r/min.中国矿业大学2008届毕业设计第3页Figure1.Photographofthetwothreephase12/8structureSwitchedReluctancemotorThepowerconverterconsistsoftwothreephaseasymmetricbridgepowerconverterinparallel.TheIGBTswereusedasthemainswitches.Threephase380VACpowersourcewasrectificatedandsuppliedtothepowerconverter.ThemaincircuitofthepowerconverterwasshowninFigure2中国矿业大学2008届毕业设计第4页Figure2.Maincircuitofthepowerconverter.Inthecontroller,thereweretherotorpositiondetectioncircuit,thecommutationcircuit,thecurrentandvoltageprotectioncircuit,themainswitchesgatedrivercircuitandthedigitalcontrollerforrotorspeedclosedloopandbalancingthedistributionoftheloads.III.CONTROLSTRATEGYThetwoSwitchedReluctancemotorcouldalldrivetheshearerbythetransmissionoutfitinthesametractionguidewaysothattherotorspeedofthetwoSwitchedReluctancemotorscouldbesynchronized.TheclosedlooprotorspeedcontrolofthedoubleSwitchedReluctancemotorsparalleldrivesystemcouldbeimplementedbyPIalgorithm.IntheSwitchedReluctancemotor1,thetriggeredsignalsofthemainswitchesinthepowerconverteraremodulatedbyPWMsignal,thecomparisonofthegivenrotorspeedandthepracticalrotorspeedaremadeandthedutyratioofPWMsignalareregulatedasfollows,where,isthegivenrotorspeed,isthepracticalrotorspeed,isthedifferenceoftherotorspeed,istheincrementofthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,istheintegralcoefficient,istheproportioncoefficient,ekisthedifferenceoftherotorspeedatktime,ek1isthedifferenceoftherotorspeedatk1time,D1kisthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,andD1k1isthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atk1time.TheoutputpoweroftheSwitchedReluctancemotordrivesystemisapproximatelyinproportiontotheaverageDCsuppliedcurrentofthepowerconverterasfollows,where,P2istheoutputpoweroftheSwitchedReluctancemotordrivesystem,IinistheaverageDCsuppliedcurrentofthepowerconverter.IntheSwitchedReluctancemotor2,thetriggeredsignalsofthemainswitchesinthepowerconverterarealsomodulatedbyPWMsignal.The