电机端部绕组表面对流换热系数的研究  

Study on Convective Heat Transfer Coefficient of End Winding Surface of Motor

作　　者：余中军[1] 陈祖涛 杨君坦 YU Zhongjun;CHEN Zutao;YANG Juntan(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]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

出　　处：《大电机技术》2023年第3期8-12,共5页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金(52077217)。

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。Solving the temperature rise of the motor end winding is the difficulty in the calculation process of the motor temperature field.Aiming at the problem that the flow field around the end winding is irregular,and it is difficult to accurately calculate the surface heat transfer coefficient by thermal circuit method or simulation,a measurement method of convective heat transfer coefficient based on a simple wind tunnel experimental device is proposed.An experimental platform is set up to measure the convective heat transfer coefficient of winding coils with different insulation levels and different modelling processes,and the influencing factors are studied.The results show that the convective heat transfer coefficients at the end surface of winding with different insulation levels are similar.Compared with the forming coil,the convective heat transfer coefficient at the end surface of the dispersed coil is larger.The accurate measurement of convective heat transfer coefficient on the end winding surface is realized through experiments,which lays the foundation for the accurate calculation of the temperature field of the subsequent motor.

关 键 词：电机端部绕组 对流换热系数 风洞实验 

分 类 号：TM301.41[电气工程—电机]