牵引电机的温度场分析

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1、北京交通大学硕士学位论文牵引电机的温度场分析姓名：杨丽伟申请学位级别：硕士专业：电力电子与电力传动指导教师：张奕黄20071201JE应銮逼厶堂亟±羔：位监塞△旦S!B△￡!ABSTRACTABSTRACT：Inthispaper,theheatgeneratingprincipleandsteadytemperaturefieldareresearchedtakingthetemperaturefieldofa300km／hasynchronoustractionmotorasresearchedobject．Thepra

2、cticaloperationofasynchronoustractionmotorisaverycomplexphysicalprocess．Todescribethisphysicalprocessexactlyitisnecessarytoexactlycalculatethevalueofeveryheatsourceandthethermalparameterofeverycomponentofthemotor．Becauseinsulationlayersinstrandsandturnsareverythin,

3、theyarealwaysbeoutofconsiderationwhencalculatingthefieldsofasynchronoustractionmotor．Butthewholeareasofstatorstrandsinsulationmayexceedthatofonepieceofstrandanditwillhavecertainofeffectonthecalculationprecision．Thesameeffectoccursforthetuminsulation．Alsotheinsulati

4、onlayersarealwaysignoredinthecalculationandanalyzeoftemperaturefield．Howeverevenathininsulationlayermayhaveasignificanttemperaturedropandthiswillhaveadirecteffectonthemachinedesign．Thevalueoftheloss，theequivalentofheatconductivityforstatorcoilandthethermalconvectio

5、ncoe箍cientofconvectionfacesareresearchedinthispaper．Theinsulationlayersareverythin,andthe8tarotstrandsinsulationdistributesthicklyintheslot．Thatmakethemashingmorecomplex．Inordertosimplifythecalculationprocessonthebasisofacceptablecalculationprecision,thispapertreat

6、switlltheinsulationbyusingequivalentmethod．Thecalculationoftheaircoolingsystemisverycomplexduetothecomplexityofthemotorconfiguration．Thispaperanalyzesthenetworkoftheaircoolingsystemusingnetworkmatrixmethod，thengivestheaircoolingnetworkmatrixofalarge-acalemotor．This

7、paperhascalculatedthetemperatureofallasynchronoustractionmotorwithaxialventsonthebasisoffiniteelementmethod，hasanalyzedthethermalcharacteristicofsomespecialpointsinthemotor，thehottestpositionofthemotorhasbeenindicated．Themainfactorsthathaveeffectonthetemperaturefie

8、ldhavebeendiscussed．Thetemperaturefieldofa300km／htractionmotorhasbeencalculatedon2Dand3Dplane．ThenacontrasthasbeentakeBbetweenthecalculationresul