电子机柜辐射特性的混合建模分析

Mixed Modeling and Analysis of Radiation Characters of Electronic Cabinets

基于实验数据模型和解析法的混合分析思路,将各类电子电气设备的电磁兼容标准检测数据与基本的电磁辐射等效源,如电流环、电偶极子、磁偶极子等的计算理论进行了有机结合。采用电流环路等效辐射源替代电子机柜的电磁辐射源,采用偶极子辐射原理分析电子机柜辐射特性,结合系统内电磁兼容分析程序(IEMCAP)原理,建立了设备的电磁兼容性(EMC)标准考核数据与偶极子辐射的近似解析法相结合的混合模型,并通过屏蔽室内进行的实验验证证明了本方法的正确性。根据该模型可直接编制成软件并形成评估手段,为有限空间内电子机柜电磁辐射干扰的预测仿真和各种重要舱室内设备的EMC优化布置设计提供了新的思路。

Based on the test data and analysis of mixed model, the test data of EMC standards for various electronic ＆ electric equipments and the theory of the basic equivalent source of electromagnetic radiation such as current loop, electric dipole and magnetic dipole, are combined in this paper. The radiation source of electronic cabinet is replaced by the equivalent source of current loop. The radiation characters of electronic cabinet are analyzed by the radiation theory of dipole. And together with the theory of IEMCAP, the mixed modeling is carried out. The experiments in shielded chamber are undertaken, and this solution is testified. Based on the model, the software is programmed and the evaluation method can be set. It provides a new solution for the simulation of radiation and interference of electronic cabinets in a limited space as well as a new tool for the optimization arrangement of equipments in important compartments.