大功率电气控制箱散热结构设计  

Design on Heat Dissipation Structure of High Power Electrical Control Box

作　　者：郭庆 GUO Qing(Shanghai Electrical Apparatus Research Institute(Group)Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]上海电器科学研究所(集团)有限公司,上海200063

出　　处：《电器与能效管理技术》2023年第4期61-66,共6页Electrical & Energy Management Technology

摘　　要：基于热传导微分方程、流体运动控制方程及辐射换热方程,建立电气控制箱耦合传热的数学模型。在电气控制箱稳态工况下,对三维温度场和气流场进行数值计算,并进行相关温升试验,计算结果和试验结果较相吻合,误差满足工程实际需求。最后,指出载流回路的最高温度部分和散热规律,计算载流回路辐射换热量在总散热的比重,仿真不同载流回路发射率及不同散热柜体结构下载流回路的温升情况。结果表明,通过提高载流回路表面发射率和采用将顶部帽檐改为开百叶窗方式可有效降低电气控制箱温升。Based on the differential equation of heat conduction,fluid motion control equation,and radiation heat transfer equation,a mathematical model of coupled heat transfer in an electrical control box is established.The three-dimensional temperature field and airflow field are numerically calculated under steady-state conditions of the electrical control box.The relevant temperature rise tests are carried out.The calculated results are in good agreement with the test results.The error meets the actual engineering requirements.Finally,the highest temperature portion and heat dissipation law of the current carrying circuit are pointed out.The proportion of radiation heat exchange in the total heat dissipation of the current carrier circuit is calculated.The temperature rise of the current carrying circuit is simulated for different current carrying circuit emissivity and different heat dissipation box structures.The results show that improving the surface emissivity of the current carrying circuit and changing the top brim to open the shutter can effectively reduce the temperature rise of the electrical control box.

关 键 词：控制箱 散热 热仿真 温升 

分 类 号：TM592[电气工程—电器]