高速电机风摩损耗计算及温升分析  

Wind Friction Loss Calculation and Temperature Rise Analysis of High-speed Motor

作　　者：李梅 刘爱民[1] LI Mei;LIU Aimin(College of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《大电机技术》2023年第3期1-7,共7页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金(51777131)。

摘　　要：损耗的计算对于电机设计及性能提升具有重要意义,而风摩损耗对高速电机的设计计算尤为重要,高速电机不同于中低速电机,其风摩损耗不能仅通过经验公式计算。为此,本文以一台新型高速双凸极开关磁阻电机为实验样机,根据高速开关磁阻电机的结构特点及通风特性,以流体力学计算为基础建立了风摩损耗流体场物理模型,利用Fluent软件对模型进行有限元仿真计算得到风摩损耗数值,接着分析了摩擦系数及转速对风摩损耗的影响。通过ANSYS对电机建立三维有限元模型,将电机主要部件的损耗值换算为热密度添加到电机模型中,并对其进行热流耦合分析,考虑到电机具有水冷及轴向通风两种冷却方式,仿真对比分析了冷却流体流速对电机冷却效果的影响,结果表明:轴向通风的冷却效果比水道冷却好得多,转子最高温度可降低100℃左右。The calculation of loss is of great significance for motor design and performance improvement,and wind friction loss is particularly important for the calculation and design of highspeed motors.High-speed motors are different from medium and low-speed motors,and wind friction losses cannot be calculated only through empirical formulas.Therefore,this paper uses a new highspeed doubly salient switched reluctance motor as the experimental prototype.According to the structural characteristics and ventilation characteristics of the high-speed switched reluctance motor,a physical model of the wind friction loss fluid field is established based on the calculation of fluid mechanics,and the model is analyzed using Fluent software.The finite element simulation calculation is carried out to obtain the value of wind friction loss,and then the influence of friction coefficient and speed on wind friction loss is analyzed.A three-dimensional finite element model of the motor is established through ANSYS,loss values of the main part of the motor are converted into heat density and added to the motor model,and the heat-flow coupling analysis is carried out.Considering the two cooling methods of water cooling and axial ventilation,the effect of the cooling fluid flow rate on the motor is compared and analyzed through simulation.The result shows that the cooling effect of axial ventilation is much better than that of water channel cooling,and the maximum temperature of the rotor can be reduced by about 100℃.

关 键 词：高速电机 风摩损耗 有限元仿真 热流耦合 温度场 

分 类 号：TM352[电气工程—电机]