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ID:33013314
大小:3.42 MB
页数:87页
时间:2019-02-19
《大型交直交变频器在矿井提升机中的应用》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、上海海洋大学硕士学位论文ApplicationofLargeAC-DC-ACConverterinMineHoisterAbstractTheminehoisterislargeelectromechanicalhoistingequipment.Toadjustthespeedofthehoisterinoperation,thetraditionalwoundmotorwasadoptedforthestepspeedadjustmentviaaserialresistancewithitsrotor.Ithast
2、headvantagesofsimpleequipmentstructureandconvenientcontrol,butitsdisadvantagesmainlylieinrelativelyhighenergyconsumptionastheslippowerisconsumedontheresistancebymeansofheating,itisalsoofrelativelyweakmechanicalpropertiesasitbelongstothestepspeedregulation.Theloa
3、doftheminehoisterisofthepotentialload,whichrequiresthetransmissiondevicetorunsmoothlyinthefourquadrants,i.e.,theenergycanflowinatwo-waymannertomeettherequirementsforhandlingwiththeheavyduty(themotorisinthegenerationstate);ithasastrongmechanicalpropertyandrelativ
4、elylargestartingtorquethatcanmeettherequirementsforstartingwithheavyduty(differentfromthefanandpump);andthespeedcanberegulatedinawiderangetomeetthevariousrequirementsforspeed(creepingatlowspeedandhoistingathighspeed).Thereproducibletransmissiondevicewiththefulld
5、igitalAC-DC-ACquadrantstransducercanwellmeettheaboverequirements.Ithastheadvantagesthattheperformanceisexcellent,thecontrolprecisionishigh,thepowerfactoris1,thepollutiontothegridharmonicwavesissmall,etc.Itwillbewidelyusedinthedrivesystemofthehoisterstepbystep.Th
6、ispapercoverstheapplicationofABBACS6000DTCtransducerofenergyfeedbackinthehoisteraswellastherelevantworkprincipleandoperationalcommissioning.TheLCLfiltercanrestrainACvoltagedistortionandcurrentharmonics.Boththeline-sideconverterandmotor-sideconverterhavetheirownR
7、DCUcontrolunitsandcontrolprograms.Theline-sideconverterrectifiesthethree-phaseACtoDCtosupplypowertothemiddleDCcircuitinthedriveunit,whichthussuppliespowertothemotor-sideconverterofthedrivemotor.Theactivefrontend(AFE)powersupplyintheinverterisathree-phase-voltage
8、PWMrectifyingpowersupply.Duetotheapplicationofthefull-controlswitchdevice(e.g.,IGBT),theAFEconverterhasbecomeafully-developedreversibleconverter,whichcanI上海海洋大学硕士学位论文
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