大功率高功率密度直流电源热设计及优化

Thermal Design and Optimization of High Power and High Power Density Direct Current Power Supply

随着大功率直流电源的频率和功率密度不断提高,散热设计变得愈加关键。大功率电源内部热量高,易造成局部温度过热,导致元器件损坏,进而使电源不能正常工作。以一台80 V/62.5 A的高功率密度直流电源为研究对象,首先介绍了所用电路拓扑,分析其关键器件的损耗,确定主要热源,对电源内部进行结构设计,并利用热仿真软件建立热分析模型,对散热器几何参数进行优化仿真,最后通过实验验证了仿真模型的正确性,有效降低了直流电源箱体内部温度,提高了电源工作的可靠性。

As the frequency and power density of high power direct current power supply continue to increase,thermal design becomes increasingly critical.The internal heat of the high power power supply is high,which can easily cause local temperature overheating,resulting in damage to components,and then making the power supply unable to work normally.Taking an 80 V/62.5 A high power density direct current power supply as the research object,the circuit topology used is first introduced,the loss of key devices is analyzed,the main heat source is determined,the internal structure of the power supply is designed,and the thermal analysis model is established by using thermal simulation software,the geometric parameters of the radiator are optimized and simulated,and finally the correctness of the simulation model is verified through experiments,which effectively reduces the internal temperature of the direct current power supply box and improves the reliability of power supply.