工作条件对铜包铝扁排导电性能的影响  

Effects of running conditions on the conductivity of copper cladding aluminum flat bars

作　　者：罗奕兵[1] 刘新华[1] 谢建新[1] 

机构地区：[1]北京科技大学新材料技术研究院,北京100083

出　　处：《北京科技大学学报》2009年第11期1430-1435,共6页Journal of University of Science and Technology Beijing

基　　金：北京市科技计划资助项目(No.207000300700707);国家高技术研究发展计划资助项目(No.2009AA03Z532)

摘　　要：采用数值分析方法,分析工作温度、扁排与环境的换热量、载流量等工作条件对铜包铝扁排导电性能的影响.结果表明:当扁排工作温度升高时,交流功率损耗增加的比值小于直流电阻增大的比例;当包覆层断面结构相同时,扁排可承载的平均电流密度随断面面积的增大而减小;采用单位长度直流电阻相同的铜包铝导电扁排替代铜扁排,在节省铜资源和原材料成本的同时,铜包铝扁排可承载的最大载流量增加,功率损耗和工作温度降低.The effects of running conditions such as operating temperature, heat exchange quality between bars and ambient, and current capacity on the conductivity of copper cladding aluminum （CCA） flat bars were analyzed by a numerical analysis method. The results show that the rate of power loss increasing is smaller than that of direct current resistance increasing due to operating tempera- ture rising. When the sectional configuration of cladding layers is the same, the mean current density which CCA fiat bars can carry decreases with the sectional area increasing. CCA flat bars can replace copper fiat bars when their direct current resistance is the same. This saves copper resource and reduces cost, at the same time the carrying capacity of bars increases. The power loss and operating temperature of CCA flat bars are lower than those of copper fiat bars.

关 键 词：包覆材料 导电排 导电性能 数值分析 

分 类 号：TM201.4[一般工业技术—材料科学与工程] TM154.1[电气工程—电工理论与新技术]