摘要
高效可靠的冷却技术是开关电源向高功率密度方向发展的迫切需求。为了实现开关电源的高效散热,克服传统冷却方式效率低、系统复杂、电源温升高等缺点,将全浸式蒸发冷却技术应用于开关电源冷却领域。以一款12V/2kW开关电源为例,阐述了全浸式蒸发冷却开关电源散热原理,对电源稳态、动态温升特性进行理论分析;通过有限元仿真及实验测试对强迫风冷及全浸式蒸发冷却开关电源温升特性进行对比研究。全浸式蒸发冷却开关电源不仅冷却结构简单,而且具有稳态温升低、温度分布均匀、无局部过热点和动态过程热应力小的优点。仿真及实验验证了理论分析的正确性,证实了全浸式蒸发冷却技术应用于开关电源冷却的可行性及技术优势。
Efficient and reliable cooling technology is an urgent demand of the development of switching mode power supply to high power density.The fully-immersed evaporative cooling technology is applied to overcome the disadvantages of traditional cooling methods,such as low cooling efficiency,complex system structure and high temperature rise of the power supply.This paper took a 12V/2kW switching mode power supply as an example,described the heat dissipation principle of the fully-immersed evaporative cooling switching mode power supply,and analyzed the steady-state and dynamic thermal characteristics of the power supply theoretically.The thermal characteristics of forced air cooling and fully-immersed evaporative cooling switching mode power supply were compared by the finite element simulations and experiments.The fully-immersed evaporative cooling switching mode power supply not only has a simple cooling structure,but also has the advantages such as lower steady-state temperature rise,more uniform temperature distribution,no local hot spots and smaller thermal stress during dynamic process.The simulation and experimental results verify the correctness of the theoretical analysis,and demonstrate the feasibility and technical advantages of the application of fully-immersed evaporative cooling technology to switching mode power supply.
作者
温英科
阮琳
Wen Yingke;Ruan Lin(Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China;University of Chinese Academy of Sciences Beijing 100049 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第18期4295-4304,共10页
Transactions of China Electrotechnical Society
基金
中国科学院前沿科学重点研究计划资助项目(QYZDY-SSW-JSC026)
关键词
开关电源
冷却技术
全浸式蒸发冷却
热特性
传热分析
Switching mode power supply
cooling technology
fully-immersed evaporative cooling
thermal characteristics
heat transfer analysis
