电气工程及其自动化专业英语

电气工程其自动专业英——感应电机学院：电子信息工程学号：130417125姓名：汪姣姣InductionmotorInductionmotor,alsocalledas"asynchronousmotor",thatis,therotorinarotatingmagneticfield,playtheroleoftherotatingmagneticfieldtogetarotationalforceandthustherotorrotation.Inductionmotorismainlycomposedoftwoimportantparts,stationarystatorandrotor,thereisaverysmallairgapinthem,bytheelectricalengineerNicolaTeslainventedin1887.BeforethefoundingofnewChina,China'smotorindustryisverybackward,afterthefoundingofnewChina,theinductionmotorforanumberofunifieddesign.1953referringtotheformerSovietUnion'sAO,AseriesdesignedtheJ,JOmotor,in1961thenationalunifieddesignoftheJ2,JQ2series,theuseofEinsulation,improvetheperformance,reducethevolumeandweight.Since1971,thedesignoftheJQ3seriesmotor,thestartingtorqueincreasedby4.5%.Startingin1979,theorganizationoftheYseriesofmotordesign,theuseofBinsulation,goodperformance,reliableoperation.In1990s,theY2seriesmotorisdesigned,whichimprovestheprotectionandinsulationlevel,reducesthenoiseandthestructureismorereasonable.Becauseoftheinductionmotorisappliedinallwalksoflifemoreandmorewidely,itisnaturalforustoofinductionmotortoworkprincipleareveryfamiliarwith,whenthewindingsofthree-phaseinductionmotorpassintothethree-phasecurrent,inthemotorairgapproducesarotationalspeedforn=60f/protatingmagneticfield,themagneticfieldcuttingrotorconductors.Intherotorconductorproducesinducedelectromotiveforce.Ifthecurrentintherotorconductorflowsinthesamephasewiththeelectromotiveforce,thecurrentcarrierissubjectedtoforceinthemagneticfield,therebygeneratinganelectromagnetictorque,whichcausestherotortorotatealongthedirectionofthemagneticfield.Iftherotorshaftwithmechanicalload,themotorwilldragtheloadrotation,atthistimethemotorfromthepowertoabsorbthepower,throughtheinductionofelectromagneticconversiontotheoutputofthemechanicalenergy,istheprincipleofinductionmotor.Inductionmotorthesubwayplayarole,runningstateinthesubwayisthefirstsideoftheelectromagneticinductiondeviceiscomposedofathree-phaseinductionmotorwindingandlaminatedinstallationonthevehiclebody,ismainlycomposedofironandaluminumcalledthesecondarysidethereverseeffecttheboardtheelectromagneticinductiondevicebetweentworailslaying.Whenasidethethree-phasewindingiscoupledwiththeACvoltage,asidewillgenerateamovingmagneticfield,resultinginelectromagneticinductionandmagneticfield,andinthetwosideofthereactionboardinduceeddycurrents.interactionbetweenthemagneticfieldandtheelectriccurrentproducesthethrustforcealongthedirectionofthemagneticfield,thevehicleisdriventheforce.ThrustcontrolbyVVVFinverterachieve.Sothatthesubwaycanrun.Inrecentyears,ChinahascompleteddesignoftheY3series,Y3seriesinductionusingcold-rolledsiliconsteelsheethastheadvantagesofhighefficiency,lownoise,theadvantagesofgoodstartingperformance.Andwiththedevelopmentofpowerelectronictechnology,semiconductortechnologyofACACspeedcontrolsystemtorealizecommunicationtechnology.After100yearsoftechnologydevelopment,motortheorybasicmature,thedevelopmentelectricalengineering,toelectricalenergyconversion,controlandefficientoftheincreasinglyhighdemand,continuouslyimprovetheperformanceofelectromagneticmaterials,electricalandelectronictechnologyiswidelyused,forthedevelopmentofinductionmotorinjectednewvitality.Thefuturebesmalleralongtheinductionmotor,electromechanicalenergyconversionefficiencyishigher,moreflexiblecontrolofthedirectionforfurtherdevelopment.感应电机感应电动机，又称异步电动机”，转子置于旋转磁中，在旋转磁场的作用下，获得一转动力矩，因而子转动。感应电主要有静止的定子和转动的转子两大部分组，定，转子之间一很小的空气间，由电气工程师拉·特斯拉于1887年明。新中国成立以前，国的电机工业非落后，新中国成之后，对感应电机进行了多次统一计。1953年参照苏联的A,AO系列设了J,JO电机，1961年全国统一设计J2，JQ2系列，用了E级绝缘，提了性能，减小了体积和重量。1971年，设计了JQ3系电机，启动转矩提了4.5%。1979年开始，组织了Y列电机的统一设，采用B级绝缘性能良好，运行可靠20世纪90年代，计了Y2系列电机提高了防护等级绝缘等级，降低噪声，结构更为合理由于感应电机在各各业的应用越来广泛，自然我们要对感应电机的给工作原理非常熟，当对感应电机的三相绕组通入相电流时，在电机气隙内产生一个转速n=60f/p的旋转场，该磁场切割子导体，在转子导体内产生感应电动势若转子导体内将过与电动势同相的电流，载流在磁场中受力，从而产生磁转矩，使转子着磁场方向旋转若在转子轴上加机械负载，电动机就拖负载旋转，此时机从电源吸收电，通过电磁感应转换为轴上输出的机械，这就是感应电的基本原理。感应电机在地铁中发挥了至关重要作用，其在地铁的运行状态为：由感应电机的三相组及叠片铁心构的电磁感应装置一次侧安装在车体上,主要由铁板及铝板成的被称为反作板的电磁感应装的二次侧铺设在两根轨道之间。当一次的三相绕组被加交流电压时,一次就会产生移动的场,从而发生电磁感应并生磁场，而在二侧的反作用板上感应产生涡流。磁场与电流的相互作用生沿磁场移动方的推力,车辆就是这一推力驱