摘要
Abstract
In order to design a power amplifier that can work under indoor computer room environmental conditions,with a total heat consumption of about 2 700 W,a compact structure,simple heat dissipation method,good heat dissipation effect,and can be installed in a 19 inch cabinet.Based on the working principle of the power amplifier unit,internal device layout,heat consumption,and comprehensive consideration of heat dissipation and structural requirements,a scheme using a combined plug-in heat sink for forced air cooling is designed.By fixing the amplifier module and power supply group on three layered plug-in heat sinks,and forming a complete air duct with the equipment sidewall,the forced air cooling heat dissipation of the amplifier unit is realized.Based on the working principle of the power amplifier unit,internal device layout,heat consumption,and comprehensive consideration of heat dissipation and structural requirements,a design scheme using a combined plug-in heat sink for forced air cooling is designed.The power amplifier module and power supply are installed in groups on three layered heat sinks,and a complete air duct is formed with the equipment sidewall to achieve forced air cooling and heat dissipation of the power amplifier unit.Theoretical calculations of heat conduction and heat dissipation were conducted on the device,and a model was established by the simulation software for numerical analysis.The numerical simulation results show that when the heat exchange of the amplifier unit reaches equilibrium during normal operation,the maximum temperature of the amplifier module casing is 64.2℃,which meets the design requirements.The feasibility of the design scheme of the power amplifier unit based on the combination insert heat sink structure and the rationality and correctness of the calculation and simulation methods are verified by means of the physical prototypes.关键词
功放/插片散热器/强迫风冷/风冷散热/理论计算/热设计Key words
power amplifier/insert heat sink/forced air cooling/air cooling and heat dissipation/theoretical calculations/thermal design分类
电子信息工程
