基于HFSS的电源机箱屏蔽效能的仿真分析  

Simulation Analysis of Shielding Effectiveness of Power Supply Case Based on HFSS

作　　者：张郑 冯成德[1] ZHANG Zheng;FENG Chengde(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学机械工程学院,四川成都610065

出　　处：《机械》2020年第7期35-41,共7页Machinery

基　　金：四川省科技计划项目(重点研发项目)(2020YFN0010)。

摘　　要：为减小电子仪器设备中电源模块之间电磁互扰,会给各个电源模块加上屏蔽机箱。而在实际中,箱体上通常会开设孔缝以便于散热和电子设备之间的连接,从而会产生电磁泄漏,导致屏蔽效能减小。因此,为了更好研究带孔缝电源机箱的屏蔽效能影响因素。在简单介绍了屏蔽效能的几种计算方法的基础上,通过与传输线法的对比,采用基于有限元法(FEM)的仿真软件HFSS对孔缝箱体进行建模仿真分析,探究孔缝的相关参数对屏蔽效能的影响规律,并据此对箱体的设计提出改进性建议。In order to reduce electromagnetic interference generated between power supply modules in electronic equipment, a shielding case is used for each power supply module. Shielding effectiveness of the case will directly affect the performance of the electronic device. The case usually has holes in it for heat dissipation and for the connection between electronic equipment, which will cause electromagnetic leakage and reduce shielding effectiveness. In order to study the shielding effectiveness of power supply case with slot, this paper briefly introduce several calculation methods of shielding effectiveness. By comparison with transmission line method, the finite element method(FEM)-based simulation software HFSS is used to model and analyze the case. The influence of the related parameters of the slot on the shielding effectiveness is studied and suggestions are made to improve case design.

关 键 词：屏蔽机箱 屏蔽效能 孔缝 HFSS 仿真分析 

分 类 号：TN98[电子电信—信息与通信工程]