电力电子变流装置散热器状态智能预测方法  

Intelligent Prediction Method for Thermal Dissipation State of Heatsink in Power Electronic Converter

作　　者：付和平 陈杰[1] 邱瑞昌[1] 刘志刚 Fu Heping;Chen Jie;Qiu Ruichang;Liu Zhigang(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China;Beijing Rail Transit Electrical Engineering Technology Research Center,Beijing 100044 China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]北京市轨道交通电气工程技术研究中心,北京100044

出　　处：《电工技术学报》2021年第20期4350-4358,共9页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金资助项目(2018JBZ004)。

摘　　要：该文首先通过建立散热器稳态热阻模型和流体动力学模型,从理论上分析散热器散热性能下降的机理,风道压降的增加和表面传热系数的增大导致散热器热阻增大;其次建立基于集总参数模型的散热器状态预测模型及方案,同时建立功率器件功率损耗计算模型,并通过仿真和实验做了相关验证;最后通过实验得出不同堵塞程度下散热器热阻、热容、热时间常数的变化曲线,为散热器在线状态预测提供新的可行方案。In this paper,a steady thermal resistance model and a fluid dynamical model of the heatsink are established to theoretically analyze the mechanism of declining thermal dissipation performance of the heatsink.Secondly,the thermal dissipation state prediction model and scheme based on lumped-parameter model are established.At the same time,the power loss calculation model of the power device is established,which is verified by simulation and experiment.Finally,the change curves of thermal resistance,thermal capacity and thermal time constant of the heatsink under different degrees of fouling are obtained,which provides a new feasible scheme for predicting the thermal dissipation state of the heatsink.

关 键 词：电力电子变流器 散热器 散热状态 智能预测 

分 类 号：TM46[电气工程—电器]