大功率九相变频异步电机通风系统热流耦合仿真分析
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摘要
为了有效解决大功率低速异步电机通风散热难题,基于热流耦合仿真分析计算方法,以1台2 800 k W、8极九相变频异步电机为例,系统分析了顶吸式强迫风冷电机内定子齿压板宽度距离对电机内风量分配、绕组温升分布以及内部风阻特性的影响,并筛选了匹配方案;同时,对比分析了九相减薄绝缘结构与三相高压绝缘结构的换热性能。最后,进行了电机的温升试验测试,温度场计算值与试验结果基本吻合,验证了基于热流耦合仿真分析计算的准确性和有效性。
In order to solve the ventilation and heat dissipation problem of high-power and low-speed asynchronous motor effectively,based on the heat flow coupling simulation analysis and calculation method,a2 800 k W and 8-pole nine-phase asynchronous motor was taken as an example to analyze the distribution of air and temperature rise distribution in the motor with the width distance of the stator tooth platen of the top suction forced aircooled motor. As well as the influence of internal wind resistance characteristics,the matching scheme was screened.At the same time,the heat transfer characteristics of the nine-phase subtracted thin insulating structure and the threephase high voltage insulation structure were compared and analyzed. Finally,the motor temperature rise experiment test was carried out,the temperature field calculation results were in good agreement with the test results,verifying the analysis and calculation of the accuracy and effectiveness of the simulation based on heat flow coupling.
In order to solve the ventilation and heat dissipation problem of high-power and low-speed asynchronous motor effectively,based on the heat flow coupling simulation analysis and calculation method,a2 800 k W and 8-pole nine-phase asynchronous motor was taken as an example to analyze the distribution of air and temperature rise distribution in the motor with the width distance of the stator tooth platen of the top suction forced aircooled motor. As well as the influence of internal wind resistance characteristics,the matching scheme was screened.At the same time,the heat transfer characteristics of the nine-phase subtracted thin insulating structure and the threephase high voltage insulation structure were compared and analyzed. Finally,the motor temperature rise experiment test was carried out,the temperature field calculation results were in good agreement with the test results,verifying the analysis and calculation of the accuracy and effectiveness of the simulation based on heat flow coupling.
引文
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[3]RAJAGOAL M S.Finite element analysis of radial cooled rotating electrical machines[J].International Jumble of Numerical Methods for Heat and Fluid Flow,1999,9(1):18-38.
[4]廖毅刚,侯小全.全空冷汽轮发电机通风冷却研究[J].东方电机,2007(5):1-12.
[5]丁树叶.复杂结构内流体流动与传热特性的研究[D].哈尔滨:哈尔滨理工大学,2008.
[6]路义萍,郑国丽,李俊亭,等.空内冷汽轮发电机的转子多路通风均匀性[J].中国电机工程学报,2010,30(3):99-104.