带有多磁路电源供电的电波暗室设计与屏蔽效能仿真

Design and Shielding Effectiveness Simulation of Anechoic Chamber with Multi-Magnetic Power Source

为了研究低压电器在电波暗室中EMC测试而引入多磁路系统供电,对电波暗室屏蔽效能的影响,通过新建电波暗室的仿真模型计算屏蔽效能,然后通过试验验证模型准确性,再利用所建立的仿真模型计算引入多磁路系统后对电波暗室屏蔽效能的影响。最后提出了在暗室周围新建一个屏蔽室用于存放多磁路系统,并将多磁路系统的控制部分分离出屏蔽室的方法,从而实现了在暗室中引入多磁路系统,同时避免产生高频电磁噪声的目的。

In order to study the influence of shielding effectiveness caused by introducing multi-magnetic circuit power source on anechoic chamber in a low-voltage apparatus in the EMC test.A simulation model for calculating the shielding effectiveness of an anechoic chamber is established and then the accuracy of the model is verified by experiments.Then the simulation model is used to calculate the influence of shielding effectiveness of anechoic chamber after a multi-magnetic circuit power source is introduced.A new shielding chamber around the anechoic chamber is proposed to store the multi-circuit magnetic system,and the control part of the multi-magnetic circuit system is separated from the shielding chamber.In this method a multi-magnetic circuit system is introduced into the chamber,but the high frequency electromagnetic noise is avoided.