摘要
随着DC/DC变换器功率的不断提升,其发热量显著增加,热设计在产品可靠性中的重要性日益凸显。针对大功率混合集成DC/DC变换器中磁性器件高温升问题,分析了磁性器件的发热原理和散热途径。通过有限元仿真软件Ansys Icepak对多种散热方案进行模拟分析,提出了在磁性器件内部填充高导热灌封胶以减小铜绕组与磁芯间热阻,同时在磁芯侧壁与管壳之间填充粘接胶以扩大散热面积的综合优化方案。仿真结果和实物测试验证表明,优化后磁性器件温度降幅达15.5℃,且通过可靠性试验验证了工艺适应性。
With the continuous enhancement of DC/DC converter power,there has been a notable increase in heat generation,highlighting the growing significance of thermal design in ensuring product reliability.This paper addresses the issue of elevated temperatures in magnetic components within high-power hybrid integrated DC/DC converters by analyzing their heating mechanisms and heat dissipation pathways.Utilizing the finite element simulation software ANSYS Icepak,various heat dissipation schemes were modeled and analyzed.A comprehensive optimization strategy was proposed,involving filling the magnetic device with high thermal conductivity potting compound to minimize the thermal resistance between the copper winding and the magnetic core,as well as adding adhesive between the sidewalls of the magnetic core and the shell to augment the heat dissipation area.Both simulation results and physical testing have confirmed that the optimized magnetic device experiences a temperature reduction of 15.5℃,and the process adaptability has been validated through reliability testing.
作者
向敏
王芷萱
练东
XIANG Min;WANG Zhixuan;LIAN Dong(The 24th Institute of China Electronics Technology Group Corporation,Chongqing 401332,P.R.China)
出处
《微电子学》
北大核心
2025年第4期684-689,共6页
Microelectronics
关键词
功率混合集成
磁性器件
热设计
热仿真
power hybrid integration
magnetic device
thermal design
thermal simulation
