大功率电源热设计及热仿真分析  

Thermal Design and Thermal Simulation Analysis of High-power Power Supply

作　　者：唐祥美 李凡考 李中原 TANG Xiangmei;LI Fankao;LI Zhongyuan(Guizhou Aerospace Linquan Motor Co.,Ltd,Guiyang 550081,China;National Precision Micro and Special Electric Motor Engineering Technology Research Center,Guiyang 550081,China)

机构地区：[1]贵州航天林泉电机有限公司,贵州贵阳550081 [2]国家精密微特电机工程技术研究中心,贵州贵阳550081

出　　处：《电子产品可靠性与环境试验》2023年第6期109-115,共7页Electronic Product Reliability and Environmental Testing

基　　金：贵州航天林泉电机有限公司0616研究所2023年度纲要重大项目资助。

摘　　要：针对某大功率电源短时工作模式应用需要,对其进行热设计及热仿真。对发热热源进行分析,基于传热基本原理和实际工况,选择流道散热的方法对电源进行散热。对电源结构布局和散热布局进行了一体化设计,确定了散热的流道和流向,并重点阐述了导热胶的选取和散热结构的安装设计。构建了液冷散热仿真模型和自然散热仿真模型,对所设计的散热结构进行热仿真分析。液冷热仿真结果表明:在1 L/min、60℃、0.3 MPa水冷条件下,最高温度为76℃,流导压降为0.05 bar。自然散热仿真结果表明:在环境温度为60℃的条件下,各工况最高温度为83.87℃。液冷散热和自然散热实测结果表明温升分别为10和25℃,验证了热仿真的正确性。Aiming at the application needs of a high-power power supply in short-time operation mode,thermal design and thermal simulation are carried out.The heat source is analyzed,and based on the basic principle of heat transfer and actual working conditions,the method of heat dissipation by flow channel is selected to dissipate heat from the power supply.The integrated design of power supply structure layout and heat dissipation layout is carried out,the flow path and direction of heat dissipation are determined,and the selection of heat-conducting adhesive and the installation design of heat dissipation structure are emphasized.The liquid cooling heat dissipation simulation model and a natural heat dissipation simulation model are constructed,and the thermal simulation analysis of the designed heat dissipation structure is carried out.The liquid cooling thermal simulation results show that under the water cooling condition of 1 L/min,60℃and 0.3 MPa,the maximum temperature is 76℃,and the pressure drop of the flow conductivity is 0.05 bar.The natural heat dissipation simulation results show that the maximum temperature of each working condition is 83.87℃when the environment temperature is 60℃.The measured results of liquid cooling and natural heat dissipation show that the temperature rise is 10℃and 25℃respectively,which verifies the correctness of the thermal simulation.

关 键 词：大功率电源 液冷散热设计 热仿真 结构仿真 导热胶 

分 类 号：TB114.32[理学—概率论与数理统计]