大型空冷汽輪發(fā)電機(jī)端部三維渦流場有限元分析

1、哈爾濱理工大學(xué)碩士學(xué)位論文大型空冷汽輪發(fā)電機(jī)端部三維渦流場有限元分析姓名：黃浩申請學(xué)位級別：碩士專業(yè)：電機(jī)與電器指導(dǎo)教師：梁艷萍20060301哈爾濱理工大學(xué)工學(xué)頸士學(xué)位論文FiniteElementAnalysison3DEddyCurrentFieldinEndZoneofLargeAir—cooledTurbogeneratorAbstractInrecentyears，諏tllthetechniqueofdesignandman

2、ufactureandtechnologicallevelforaircooledturbogeneratorimproved，itstechnologyandeconomicaltargetalsoimprovedTheaircooledturbogeneratorwithhighreliabilityhi曲efficiencyandhighcapacityhasgraduallybeenachoicetomanygeneratorg

3、roups，sotheimprovingofcapacityofaircooledturbogeneratorbecamemoreandmoresignificantButthecapacityofaircooledturbogrneratorisimprovedmainlybyaddingelectromagneticloadofthebarandlossofthebarwillberasiedwhenaddingelectromag

4、neticload，theendregioneakagewillbeenhancedtheeddycurrentlossesofendzonestructureswillalsobeincreasedThetemperatureofthegeneratorwillincreaseevenabovetheallowabletemperatureandalsothereliabilityofgeneratorbeaffected，Inord

5、ertoehanceradiatingandtoreducelosses，thestructureofgeneratormustbedesignedproperlyThustheaccuracyofendregionfieldcomputationoflargeaircooledturbogeneratorisessentialtesolveaboveissuesProblemsinturbogeneratorendzonemagnet

6、icfieldwereputforwardmanyyearsago，butbecauseofthecharactersoftheendzone，ithasn’tbeensegledperfectlyFirstlyagainsttoproblemsexistedincalculationofelectromagneticfieldintheendregionoflargeaircooledturbogeneratorAfullmathem

7、aticmodelusedtocalculateendfieldoflargeturbogeneratorbyA，穢一A3DFEMispresentedThemodelcombinedendzonewithsteppedstatorcore，expandedsolvedregionintothestatorandtherotorcoreTheendstructuresspatiallocation，theactualshapeofend

8、collandtheirsinfluencetoendfieldcalculationareconsideredaccuratelyThestatormadrotorcoilsaswellascurrentcarriedincoilsareincludedinthemodel，andsimulatedaccuratelyWithcombined2Dand3Dmagneticfieldmethod，theboundarycondition

9、isdeterminedTakingQF一1502aircooledturbogeneratorforexample，theendfieldiscalculatedatno—loadandatfullloadwitlleddycurrenttakingintoaccountThentheformulaofstatorend—leakagereactanceisderived，thestatorend—leakagereactanc2is