全封闭扇冷式电机三维全域稳态温度场计算

发布时间：2018-02-25 23:16

本文关键词： 全封闭扇冷式感应电机三维温度场有限元法数值分析损耗特性　出处：《电机与控制学报》2017年07期 　论文类型：期刊论文

【摘要】：为研究全封闭扇冷式(totally enclosed fan-cool,TEFC)感应电机额定负载运行时的温度场,以一台55 k W异步电机为例,运用等效方法对电机实际结构进行简化处理,通过绝缘等效手段建立了实际绕组等效模型,进而建立了电机温度场仿真计算模型,基于导热学基本定律及稳态热传导方程,采用有限元法对其进行稳态温度场计算。计算过程中,通过采用电机内冷却介质等效导热系数的方法解决了转子旋转以及电机内空气流动的问题;得到了电机各结构件的温升分布特性;对定子铁心不同位置的温升情况进行了细致研究,分析了转子内部温升分布情况,并对单根绕组的温升以及绕组周向的温升差异进行了数值分析,对样机进行了实验测试,将计算结果与实验结果进行对比,验证了计算方法的准确性。
[Abstract]:In order to study the temperature field of a fully enclosed fan cooled enclosed fan-cooler Tefc motor under rated load, a 55kW asynchronous motor is taken as an example. The equivalent method is used to simplify the actual structure of the motor. Through the insulation equivalent method, the equivalent model of actual winding is established, and then the simulation calculation model of temperature field of motor is established, which is based on the basic law of heat conduction and the equation of steady-state heat conduction. The steady-state temperature field is calculated by finite element method. In the process of calculation, the rotor rotation and the air flow in the motor are solved by using the method of equivalent thermal conductivity of the cooling medium in the motor. The characteristics of temperature rise distribution of each structure of motor are obtained, and the temperature rise in different positions of stator iron core is studied in detail, and the temperature rise distribution inside rotor is analyzed. The temperature rise of the single winding and the difference of the temperature rise around the winding are analyzed numerically. The experimental results of the prototype are tested, and the accuracy of the calculation method is verified by comparing the calculated results with the experimental results.
【作者单位】：中国船舶重工集团公司第七○四研究所;南京师范大学南瑞电气与自动化学院;哈尔滨理工大学电气与电子工程学院;
【基金】：哈尔滨市科技创新人才项目(2016RAXXJ026) 黑龙江省教育厅新世纪优秀人才基金(1254-NCET006)
【分类号】：TM346

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