Electromagnetic Shielding Calculation of Air Core Reactor in EAST Fast Control Power Supply
Bao Xiaohua1, Hu Yunpeng1, Zhang Cheng1, Gao Ge2
1. School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China. 2. Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China
Abstract：In experimental advanced superconducting Tokamak (EAST) power system, the magnetic field can cause interference of the magnetic field to the surrounding electronic equipment in operation of air core reactor. In this paper, the theoretical analysis of shielding magnetic field of metal mesh is presented. The expressions of shielding factor of single layer metal mesh and double layer metal mesh are obtained by analytical calculation. Based on the physical model, a number of 3D models are established. The metal mesh of different materials (DT4A, GO, 1008steel) is selected as a shield. Using three-dimensional finite element method and Matlab simulation and flux density distribution around the shield cabinet were obtained. Then, analysis of the shielding coefficient and the three influencing factors, three factors are number of mesh, excitation frequency and distance. The results show that the shielding effect of DT4A is best when the single metal mesh is shielded, and the shielding effect of DT4A/GO is best when the double metal mesh is shielded. Overall, the double layers are more effective than single layer shields. To further study the safety operation of the air core reactor is of great significance.
鲍晓华, 胡云鹏, 张程, 高格. EAST快控电源中空心电抗器的电磁屏蔽计算[J]. 电工技术学报, 2017, 32(增刊2): 64-70.
Bao Xiaohua, Hu Yunpeng, Zhang Cheng, Gao Ge. Electromagnetic Shielding Calculation of Air Core Reactor in EAST Fast Control Power Supply. Transactions of China Electrotechnical Society, 2017, 32(增刊2): 64-70.
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2017, Vol. 32 
