脉冲功率电源辐射电磁场屏蔽测量与分析

发布时间：2018-05-11 04:16

本文选题：环探头 + 瞬态电流　；参考：《高电压技术》2014年04期

【摘要】：脉冲功率电源会产生很强的辐射电磁干扰,特别是在电源电抗器附近场强很大,其产生的电磁场会直接影响电源附近测控设备以及工作人员的安全。为了有效控制电源电抗器附近干扰水平,对其电磁场进行了屏蔽试验,同时在理论分析和数值计算的基础上,结合试验数据进行了分析研究。首先设计了板式屏蔽结构,屏蔽板采用双层板结构,材料分别为硬铝和冷轧钢;用有限元方法分别计算了单层和双层板的屏蔽效果,兼顾其对原有电路参数的影响,获得了屏蔽板的结构与材料参数;然后,试验测量了屏蔽效果,并与仿真结果进行了对比分析。结果表明,高电导率材料起主要屏蔽作用,而采用的低电导率材料主要起到结构支撑作用,即铝制板对屏蔽效果的贡献最大;仿真和试验结果均表明,屏蔽后磁场峰值衰减1个数量级,因此提出的屏蔽方案能够有效抑制电源电抗器前干扰水平。
[Abstract]:The pulsed power supply will produce very strong electromagnetic interference, especially in the vicinity of the power supply reactor. The electromagnetic field will directly affect the safety of the measurement and control equipment near the power supply as well as the safety of the staff. In order to effectively control the interference level in the vicinity of the power supply reactor, the shielding test of electromagnetic field is carried out. On the basis of theoretical analysis and numerical calculation, the experimental data are analyzed and studied. First of all, the plate shielding structure is designed, the shield plate is made of hard aluminum and cold rolled steel, the shielding effect of single layer and double layer plate is calculated by finite element method, and the influence on the original circuit parameters is considered. The structure and material parameters of the shield plate are obtained, and then the shielding effect is measured and compared with the simulation results. The results show that the high conductivity material plays the main shielding role, while the low conductivity material mainly plays the role of structural support, that is, aluminum plate has the greatest contribution to the shielding effect, and the simulation and test results show that, The peak value of magnetic field attenuates by one order of magnitude after shielding, so the proposed shielding scheme can effectively suppress the interference level in front of power reactor.
【作者单位】：北京理工大学;北京特种机电技术研究所;
【基金】：国家自然科学基金重点项目(51237007)~~
【分类号】：TN86

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