基于端部绕组模块的定子励磁无刷电机冷却方法  

End-winding module-based cooling method for stator-excitation brushless machines

作　　者：花为[1] 张志恒 朱新凯 王玉彬[3] 李祥林 Hua Wei;Zhang Zhiheng;Zhu Xinkai;Wang Yubin;Li Xianglin(School of Electrical Engineering,Southeast University,Nanjing 210096,China;Department of Electric Power Engineering,North China Electric Power University,Baoding 071003,China;College of New Energy,China University of Petroleum,Qingdao 266580,China;College of Electrical Engineering,Qingdao University,Qingdao 266071,China)

机构地区：[1]东南大学电气工程学院,南京210096 [2]华北电力大学(保定)电力工程系,保定071003 [3]中国石油大学(华东)新能源学院,青岛266580 [4]青岛大学电气工程学院,青岛266071

出　　处：《东南大学学报（自然科学版）》2024年第1期240-250,共11页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金重点资助项目(52130706);国家自然科学基金青年科学基金资助项目(52207053);江苏省研究生科研与实践创新计划资助项目(KYCX22_0257)。

摘　　要：为了提升定子励磁无刷电机的冷却能力,提出了一种基于端部绕组模块的定子励磁无刷电机冷却方法.在电机端部绕组和定子铁芯叠片端部的间隙中插入端部绕组冷却(EWC)模块,以减小定子绕组热点区域和冷却介质之间的间隙,从而提高端部绕组的冷却能力.对非重叠式集中绕组长度计算模型进行改进,评估采用EWC模块前后电机定子电枢绕组长度的变化,分析EWC模块的电导率对电机定子损耗的影响.采用计算流体动力学(CFD)模型,对比EWC模块在不同铜耗和励磁源损耗密度下的冷却性能.结果表明,采用EWC模块可以使端部绕组的稳态温升降低约50%,热态时的绕组电阻降低7.51%,从而改善了定子的冷却条件.To enhance the cooling capability of the stator-excitation brushless machines,an end-winding module-based cooling method was proposed.An end-winding cooling(EWC)module was inserted into the gap between the end-winding and the end-of-stator laminations of machines.The end-winding cooling capability can be improved due to the reduced distance between the hot-spot of stator winding and the coolant.The calculation model of the winding length for non-overlapping concentrated winding was improved to evaluate the change of the stator armature winding length before and after adopting the EWC module.The effects of the conductivity of the EWC module on the machine stator losses were investigated.The cooling performance of the EWC module under different copper consumption and excitation source loss densities was compared using the computational fluid dynamics(CFD)model.The results show that the hot-spot temperature rise of the end-winding reduces by approximately 50%and the hot-state resistance on the armature winding decreases by 7.51%using the proposed EWC module.The cooling conditions of the whole stator is improved.

关 键 词：定子励磁无刷电机 端部绕组 冷却设计 热态电阻 

分 类 号：TM345[电气工程—电机]