摘要
压接式功率器件内部通常充有保护气体,以提高绝缘强度和防止氧化。为明确压接式功率器件内部不同保护气体的对流换热特性,以压接式IEGT为例,计算分析了其工作损耗,并利用ANSYS进行了迭代热仿真数值分析。针对SF6、N2和SF6/N2混合气体,对比分析了相应的温度场分布,得到了格拉晓夫数和努塞尔数,进而明确了不同保护气体的散热作用,为压接式功率器件的内部保护气体的选择、应用设计及优化提供了参考。
Inside press-pack devices,protective gas is hermetically sealed to improve the insulation strength and prevent electrodes from being degraded due to oxidation. In order to clarify the convective heat transfer characteristics of different protective gas in presspack power devices,this paper takes press-pack IEGT as an example,analyzes its power losses,and carries out iterative thermal numerical simulation in ANSYS. By comparing temperature distribution of SF6,N2,and SF6/N2 mixture,Grasof number and Nusselt number are obtained. Then the heat dissipation effect of the three different protective gas is confirmed. This paper provides a reference for the selection of internal protective gas,heat dissipation design and optimization of internal structure of press-pack power devices.
作者
肖磊石
赵耀
代思洋
王志强
XIAO Leishi;ZHAO Yao;DAI Siyang;WANG Zhiqiang(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《南方电网技术》
CSCD
北大核心
2020年第6期53-58,共6页
Southern Power System Technology
基金
广东电网有限责任公司科技项目(GDKJXM20172608)。
关键词
压接式
保护气体
对流换热
press-pack
protective gases
convective heat transfer
