无刷同步发电机电枢绕组温升分析的分段磁热耦合法  

Piecewise Magnetothermal Coupling Method for Temperature Rise Analysis of Armature Winding of Brushless Synchronous Generator

作　　者：薛敬业 陈志辉[1] 茆林仪 XUE Jingye;CHEN Zhihui;MAO Linyi(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院,南京211100

出　　处：《微特电机》2023年第12期14-20,共7页Small & Special Electrical Machines

摘　　要：为分析30 kVA风冷无刷同步发电机运行过程中电枢绕组的温升情况,依据流体力学和传热学的基本理论知识,建立发电机的流固耦合模型,采用磁热耦合法对电枢绕组的温度进行数值计算和仿真。在整体绕组分析法基础上提出考虑不同区间温度差异的绕组分段分析法,对比研究了绕组分两段与绕组分四段方法,采用拟合的方法得到三种方法下绕组稳态温升。经过温升测试实验验证,绕组分两段方法可以节省仿真时间,大幅提高温升计算精度。In order to analyze the temperature rise of the armature winding during the operation of the 30 kVA air-cooled brushless synchronous generator,based on the basic theoretical knowledge of fluid mechanics and heat transfer,the fluid-solid coupling model of the main generator was established,and the magnetothermal coupling method was used to analyze the temperature rise of the armature winding.The temperature of the pivot winding was numerically calculated and simulated.On the basis of the overall winding analysis method,a winding segment analysis method considering the temperature difference in different intervals was proposed,and a comparative study was made on the two-segment winding and four-segment winding methods,and the steady-state temperature rise of the winding under the three methods was obtained by fitting.The temperature rise test experiment in verified that the two-stage winding method can save simulation time and greatly improve the temperature rise accuracy.

关 键 词：无刷同步发电机 计算流体力学 磁热耦合 流固耦合 电枢绕组温升 平均温度 

分 类 号：TM341[电气工程—电机]