电机端部绕组表面对流换热系数的研究2023.№3电机端部绕组表面对流换热系数的研究余中军，陈祖涛，杨君坦(海军工程大学舰船综合电力技术国防科技重点实验室，武汉430033)［摘要］电机端部绕组的温升求解是电机温度场计算过程中的难点所在。针对端部绕组周围的流场域不规则，难以用热路法或有限元法精确计算其表面换热系数的难题，提出了一种基于简易风洞实验装置的对流换热系数测量方法，搭建了实验平台对不同绝缘等级、不同成型工艺的绕组线圈的表面对流换热系数进行了测量，并分析了对流换热系数在不同影响因素下的变化规律。结果表明，不同绝缘等级的绕组端部表面对流换热系数相差不大，相比于成型线圈，散开线圈端部表面的对流换热系数更大。通过实验实现了对端部绕组表面对流换热系数的准确测量，为后续电机温度场的准确计算奠定了基础。［关键词］电机端部绕组;对流换热系数;风洞实验［中图分类号］TM301.4+1［文献标志码］A［文章编号］1000-3983(2023)03-0008-05StudyonConvectiveHeatTransferCoefficientofEndWindingSurfaceofMotorYUZhongjun，CHENZutao，YANGJuntan(NationalKeyLaboratoryofScienceandTechnologyonVesselIntegratedPowerSystem，NavalUniversityofEngineering，Wuhan430033，China)Abstract:Solvingthetemperatureriseofthemotorendwindingisthedifficultyinthecalculationprocessofthemotortemperaturefield．Aimingattheproblemthattheflowfieldaroundtheendwindingisirregular，anditisdifficulttoaccuratelycalculatethesurfaceheattransfercoefficientbythermalcircuitmethodorsimulation，ameasurementmethodofconvectiveheattransfercoefficientbasedonasimplewindtunnelexperimentaldeviceisproposed．Anexperimentalplatformissetuptomeasuretheconvectiveheattransfercoefficientofwindingcoilswithdifferentinsulationlevelsanddifferentmodellingprocesses，andtheinfluencingfactorsarestudied．Theresultsshowthattheconvectiveheattransfercoefficientsattheendsurfaceofwindingwithdifferentinsulationlevelsaresimilar．Comparedwiththeformingcoil，theconvectiveheattransfercoefficientattheendsurfaceofthedispersedcoilislarger．Theaccuratemeasurementofconvectiveheattransfercoefficientontheendwindingsurfaceisrealizedthroughexperiments，whichlaysthefoundationfortheaccuratecalculati...
