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题名	大功率电力电子变流设备中蒸发冷却技术研究; 大功率电力电子变流设备中蒸发冷却技术研究
作者	1栾凤飞,电工研究所
学位类别	硕士
答辩日期	2007-01-12
授予单位	中国科学院电工研究所
导师	1王海峰,电工研究所
关键词	蒸发冷却 电力电子器件 热阻 温度场 evaporative cooling power electronic devices thermal resistance temperature field
其他题名	大功率电力电子变流设备中蒸发冷却技术研究
中文摘要	随着大功率电力电子器件容量的增加，器件的损耗也随之增加，如果没有可靠的散热方法，将会使器件的温度超过结温而导致器件损坏，所以大功率电力电子器件的散热就显得尤为重要。本文针对大功率电力电子器件的散热问题，搭建了蒸发冷却技术实验装置，并对其进行深入研究。 针对电力电子器件的蒸发冷却热量传递方式，本文论述了传热学中三种基本的传热方式，分析了容积沸腾和饱和流动沸腾的机理，并总结了容积沸腾和饱和流动沸腾的经验关系式，计算出散热器壁面与介质之间的对流换热系数。 本文搭建了三相桥式不可控整流电路用蒸发冷却技术系统装置，并在此装置上对相关问题进行了实验研究，进行了变流设备的短路实验和负载实验，以及不同管路结构的蒸发冷却技术比较。在实验的基础上对该系统的散热器热阻进行了重点研究，同时与国家标准中水冷散热器相关参数相比较，证明了蒸发冷却技术具有散热效率高、结构简单、体积小、重量轻、可靠性高等优越性。 在实验研究的基础上，建立了三维热传导模型，对相关的仿真参数进行了分析和计算。在不同功耗情况下进行了温度场仿真计算，并与实验数据进行分析比较，验证了温度场仿真计算的正确性。 通过本文的研究，验证了大功率电力电子变流设备采用蒸发冷却技术在工程应用中的可行性和优越性，为蒸发冷却技术在大功率电力电子装置中的推广应用奠定了基础。 The power loss of the large capacity power electronics devices is increase with the rapid development of the power electric industry. The temperature of the power electronic component may exceed the safety restriction if there is no effective way to cool it, so the cooling technology is very important in the power electronic equipment reliability. Based on our experimental study on a model, the evaporative cooling technology is presented and researched. In the area of theory research, the three basic heat transfer modes are discussed. The mechanism and the empirical formula of pool boiling and flow boiling is illuminated. The convective heat transfer coefficient between the heat sink and the coolant is calculated. In the area of the experiment research, the evaporative cooling system in three phase bridge non-controlled rectifier is built up, many experiments had been done, and the temperature distribution of the large capacity power electronic devices is measured and the thermal resistance which is between the large capacity power electronic devices and the coolant is calculated. The correlation parameter comparison between the evaporative cooling technology and the water-cooling technology reveals that the evaporative cooling technology has the advantages of high cooling efficiency, simple operation, small volume, light weight and high reliability. In the area of simulation and calculation, the 3D steady-state heat transfer model is set up, and the temperature distribution is analyzed. The comparison between the experimental data and computational result verifies the validity of the temperature field simulation method. Through above study, the calculated and experimental data show that the cooling efficiency of the evaporative cooling technology is much better than other cooling methods, such as air-cooling, forced air-cooling and water-cooling. And it will be useful in the further application in the large capacity power electronic devices.
语种	中文
公开日期	2010-10-18
页码	72
分类号	TM1;TM921
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7003]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1栾凤飞,电工研究所. 大功率电力电子变流设备中蒸发冷却技术研究, 大功率电力电子变流设备中蒸发冷却技术研究[D]. 中国科学院电工研究所. 2007.

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