潜水电机温度场研究方法及影响因素分析
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摘要
以充油型潜水电机为研究对象,建立等效热阻网络模型和三维温度场计算模型,并将损耗和机壳表面对流传热系数以定值的形式加载到模型中,通过对比发现,有限体积法较等效热阻网络法更能合理地反映电机温度分布,进而以有限体积法为研究基础,对温度边界条件中影响因素进行分析,从而提出一种适用于潜水电机温度场磁热流耦合设置方法,即铜耗、粘滞损耗、机壳表面对流传热系数和内流场入口温度变化的UDF(User Defined Function)的设置,有助于提高温度计算结果准确性。
Taking oil filled submersible motor for research object,the equivalent thermal resistance network model and3 D temperature field model was established. Loss and convective heat transfer coefficient were loaded into the model as constant value. By comparison,the finite volume method is more realistic to reflect temperature distribution than the equivalent thermal resistance network method. Based on the finite volume method,the influencing factors of temperature boundary conditions were analyzed. A new analysis method of temperature field of magnetic-thermal-flux for submersible motor was presented. The key of the method is to set up UDF( User Defined Function) with the change of copper loss,viscous loss,convective heat transfer coefficient on the surface of the casing and inlet temperature of the internal flow field. It is helpful to improve the accuracy of temperature calculation.
Taking oil filled submersible motor for research object,the equivalent thermal resistance network model and3 D temperature field model was established. Loss and convective heat transfer coefficient were loaded into the model as constant value. By comparison,the finite volume method is more realistic to reflect temperature distribution than the equivalent thermal resistance network method. Based on the finite volume method,the influencing factors of temperature boundary conditions were analyzed. A new analysis method of temperature field of magnetic-thermal-flux for submersible motor was presented. The key of the method is to set up UDF( User Defined Function) with the change of copper loss,viscous loss,convective heat transfer coefficient on the surface of the casing and inlet temperature of the internal flow field. It is helpful to improve the accuracy of temperature calculation.
引文
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[15]江善林,邹继斌,徐永向,等.考虑旋转磁通和趋肤效应的变系数铁耗计算模型[J].中国电机工程学报,2011,31(3):104-110.
[2]LI W L,ZHANG X C,CHENG S K,et al.Thermal optimization for a HSPMG used for distributed generation systems[J].IEEE Transactions on Industrial Electronics.2013,60(2):474-482.
[3]ZHANG Y J,RUAN J J,HUANG T,et al.Calculation of temperature rise in air-cooled induction motors through 3-D coupled electromagnetic fluid-dynamical and thermal finite-element analysis[J].IEEE Transactions on Magnetics,2012,48(2):1047-1050.
[4]李伟力,李勇,杨雪峰,等.大型空冷汽轮发电机定子端部温度场与流体场的计算与分析[J].中国电机工程学报,2009,29(36):80-87.
[5]李伟力,陈玉红,霍菲阳,等.大型水轮发电机转子旋转状态下磁极间流体流动与温度场分析[J].中国电机工程学报,2012,32(9):132-139.
[6]DURAN M J,FERNANDEZ J.Lumped-parameter thermal model for induction machines[J].IEEE Transactions on Energy Conversion,2004,19(4):791-792.
[7]OKORO O I,WEIDEMANN B,OJO O.An efficient thermal model for induction machines[C]//Record of 39th IEEE Industry Applications Conference.Salt Lake City,Utah,USA:IEEE,2004:2477-2484.
[8]DORRELL D G.Combined thermal and electromagnetic analysis of permanent magnet and induction machines to aid calculation[J].IEEE Transactions on Industrial Electronics,2008,55(10):3566-3574.
[9]MEZANI S,TAKORABET N,LAPORTE B.A combined electromagnetic and thermal analysis of induction motors[J].IEEETransactions on Magnetics,2005,41(5):1572-1575.
[10]王晓远,高鹏.等效热网络法和有限元法在轮毂电机温度场计算中的应用[J].电工技术学报,2016,31(16):26-33.
[11]LIU Y L.Calculation and analysis of 3D temperature field in steady state of the submersible motor[C]//2010 International Conference on Electrical and Control Engineering,Wuhan:IEEE,2010,3427-3430.
[12]ZOU J B,QI W J,XU Y X,et al.Design of deep sea oil-filled brushless DC motors considering the high pressure effect[J].IEEE Transactions on Magnetics,2012,48(11):4220-4223.
[13]黄允凯,胡虔生,朱建国.顾及旋转铁耗的高速爪极电机三维磁热耦合分析[J].电工技术学报,2010,25(5):54-60.
[14]孟大伟,刘宇蕾,张庆军,等.潜油电机整体三维温度场耦合计算与分析[J].电机与控制学报,2010,14(1):52-55.
[15]江善林,邹继斌,徐永向,等.考虑旋转磁通和趋肤效应的变系数铁耗计算模型[J].中国电机工程学报,2011,31(3):104-110.