电子束二极管脉冲磁场的涡流分析及抑制

古亮; 谭清月; 张腾翼; 帅潇潇; 王帅

doi:10.11884/HPLPB201931.180309

电子束二极管脉冲磁场的涡流分析及抑制

doi: 10.11884/HPLPB201931.180309

古亮^{1, 2,},
谭清月¹,
张腾翼¹,
帅潇潇¹,
王帅¹

1.
重庆理工大学电气与电子工程学院, 重庆 400054
2.
重庆市能源互联网工程技术研究中心, 重庆 400054

基金项目:

国家国际科技合作专项 2015DFR70480

详细信息

作者简介:
古亮(1976-)，男，博士，副教授，从事高电压绝缘新技术、脉冲功率技术方面研究; guliang@cqut.edu.cn

中图分类号: TN103
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- 文章访问数: 1150
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- 被引次数: 0
出版历程
- 收稿日期: 2018-11-09
- 修回日期: 2018-12-05
- 刊出日期: 2019-01-15

Eddy current analysis and suppression measures of pulsed magnetic field of electron beam

1.
School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
2.
Chongqing Engineering Research Center of Energy Internet, Chongqing 400054, China

摘要

摘要: 针对强流脉冲电子束二极管金属表面涡流引起的器件内部磁场分布不均、电子束辐照材料表面处理效果不佳等现象，提出了多板钢联接式内壁与玻璃外壁相结合的双层结构设计。基于有限元仿真软件对电子束系统的磁场与涡流进行了数值计算，分析了涡流的影响因素和涡流对于电子束源磁场的影响。通过数值计算表明，设计的新型介质壁结构能有效降低涡流对于电子束的影响。该分析为消除感应涡流对真空二极管内部磁场的影响提供了理论依据，具有良好的参考价值。
- 磁场分布 /
- 涡流 /
- 介质壁 /
- 双层结构 /
- 数值计算
Abstract: In view of the uneven distribution of magnetic field in the devices caused by the metal surface eddy current in the high-current pulse electron beam diode, the surface treatment effect of the electron beam irradiated material is not good, and the double structure design of the multi plate steel connecting inner wall with the glass outer wall is proposed. Based on the finite element simulation software, the magnetic field and eddy current of the electron beam system are numerically calculated. The influence factors of the eddy current and the influence of the eddy current on the magnetic field of the electron beam source are analyzed. The result shows that the design of the new dielectric wall structure can effectively reduce the effect of eddy current on the electron beam. The analysis provides a theoretical basis for eliminating the influence of induction eddy current on the magnetic field of diode.
- magnetic field distribution /
- eddy current /
- dielectric wall /
- double layer structure /
- numerical calculation

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图 1 强流脉冲电子束设备

Figure 1. High current pulse electron beam equipment

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图 2 线圈磁场计算

Figure 2. Calculation of coil's magnetic field

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图 3 计算模型图

Figure 3. Calculation model diagram

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图 4 网格剖分图

Figure 4. Mesh generation diagram

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图 5 励磁电流的波形

Figure 5. Waveform of excitation current

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图 6 脉冲上升时间为5.8 ms器件内部的磁场分布

Figure 6. Magnetic field distribution in the device under 5.8 ms pulse rise time

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图 7 不同脉冲上升时间下磁场随x轴的变化

Figure 7. Change of magnetic field with x axis under different pulse rise time

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图 8 不锈钢壁的涡流分布

Figure 8. Eddy current distribution of stainless steel wall (pulse rise time is 5.8 ms)

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图 9 涡流在不锈钢壁上沿x方向的变化

Figure 9. Change of eddy current in the direction of x on the stainless steel wall

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图 10 x=285 mm处涡流沿z方向的变化

Figure 10. Change of eddy current in the direction of z at x=285mm

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图 11 不同电导率下涡流沿z方向的变化

Figure 11. Change of eddy current along z direction under different conductivity

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图 12 双层结构计算模型

Figure 12. Calculation model of double layer structure

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图 13 双层结构器件内部的磁场分布

Figure 13. Magnetic field distribution inside a double layer structure device

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图 14 双层结构介质壁的涡流分布

Figure 14. The eddy current distribution of a double layer medium wall

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图 15 双层结构中x=285 mm处涡流沿z

Figure 15. Change of eddy current along z direction at x=285 mm in a double layer structure

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图 16 器件内轴线磁场分布比较

Figure 16. Comparison of magnetic field distribution on the inner axis of a device

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表 1 导体材料主要参数

Table 1. Main parameters of conductor material

material	relative permeability μ	conductivity σ/(10⁷S·m^-1)	skin depth δ/ mm
copper	1	5.998	9
304 stainless steel	1.08	0.137	67
iron	4000	0.112	0.34

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