计及齿槽作用及杯型转子结构影响的油摩损耗解析计算  

Analytical calculation of oil friction loss taking into account action of cup-shaped rotor and teeth-grooves stator

作　　者：蒋鹏 李辉[1] 向学位 殷毅 袁彬 JIANG Peng;LI Hui;XIANG Xuewei;YIN Yi;YUAN Bin(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电机与控制学报》2023年第5期9-19,共11页Electric Machines and Control

基　　金：国家重点研发计划项目(2022YFB4702100);国家自然科学基金(52207037)。

摘　　要：针对传统浸油冷却轮毂电机油摩损耗解析式未考虑齿槽作用,以及轮毂电机与减速器集成设计时转子轭部内凹形成杯型结构的影响而导致油摩损耗计算误差较大的问题,提出了改进解析模型。首先,根据轮毂电机定子齿槽结构及尺寸,将气隙分为齿部和槽口两个部分,分别建立两者单独作用和综合作用下的气隙油摩损耗的解析模型;其次,根据轮毂电机转子结构特点,将其划分为结构规则的不同区域,分别建立各个区域的端面油摩损耗解析模型,两者综合作用形成总油摩损耗;最后,通过基于CFD的流场仿真值、搅油测试实验值与解析计算值对比,新型解析计算方法较传统方法在杯型转子端面油摩损耗方面计算精度平均提高了6.55%,在考虑齿槽作用下气隙油摩损耗最大计算精度提高了12.6%,在不同温度条件下总油摩损耗计算精度平均提高了5.72%,验证了解析模型准确性。In order to solve the problem that the traditional analytical formula of oil friction loss in oil-immersed cooling wheel hub motor oil does not consider the effect of cogs and the cup structure formed by the concave rotor yoke in the integrated design of wheel hub motor and reducer,an improved analytical model was established.Firstly,according to the slot structure of the in-wheel motor stator,the air gap was divided into two parts:the tooth part and the slot.The analytical models of the oil friction loss of the air gap under the independent action and the combined action of the two parts were established respectively.Secondly,according to the characteristics of the in-wheel motor rotor structure,it was divided into different regions with structural rules,and the end face oil friction loss analytical models of each region were established respectively,and the sum of the two was the total oil friction loss.Finally,by comparing the CFD based flow field simulation values,stirring test values and analytical calculation values,com-pared with the traditional methods,the calculation accuracy of the new analytical calculation method in the oil friction loss of the end face of the cup rotor is improved by 6.55%on average,and the maximum calculation accuracy of the oil friction loss of the air gap is improved by 12.6%when considering the ac-tion of the tooth groove.Under different temperature conditions,the calculation accuracy of total oil fric-tion loss increases by 5.72%on average,which verifies the accuracy of the analytical model.

关 键 词：轮毂永磁同步电机 浸油冷却 油摩损耗 解析计算 齿槽作用 杯型转子 

分 类 号：TM351[电气工程—电机]