考虑初始接触压力的滑动电接触界面磁扩散模型

doi:10.19595/j.cnki.1000-6753.tces.L90227

Abstract
Figure/Table
References
Related Citation (13)

Download: PDF (2053 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract This paper proposed an optimized magnetic diffusion model to analyze magnetic flux density, current density, Joule heat, electromagnetic force and current skin depth in different time and position of an electromagnetic launcher. The model concerned on the difference caused by the contact state, so that the multi-field distribution under the conditions of irregular armature shape, driving current waveform can be obtained. The result shows that when the interference is 1mm, the actual contact area is in the middle of the theoretical contact area, and the current concentrates at the rear end of the actual contact area and then moves ahead. It is found that the difference in electrical conductivity of the actual contact area would not affect the current distribution after the other four typical contact states were analyzed. Due to the skin effect, the skin depth close to the armature is shallow, and the ramp current has more obvious skin effect than the step current. The results deduced by this model are consistent with the theoretical formula. This study can provide an approach to observe transition, skin effect and armature structure optimization, laying a foundation for 3D field calculation.

Key words： Electromagnetic rail launcher interference contact magnetic diffusion model skin effect

Received: 04 July 2020

PACS:

TM359.4

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Zhang Jiawei
	Lu Junyong
	Tan Sai
	Zhang Yongsheng
	Li Bai

Cite this article:

Zhang Jiawei,Lu Junyong,Tan Sai等. A Magnetic Diffusion Model of Electromagnetic Launcher Considering Initial Contact Pressure[J]. Transactions of China Electrotechnical Society, 2022, 37(2): 488-495.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90227 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I2/488

[1] 马伟明, 鲁军勇. 电磁发射技术[J]. 国防科技大学学报, 2016, 38(6): 1-5.
Ma Weiming, Lu Junyong.Electromagnetic launch technology[J]. Journal of National University of Defense Technology, 2016, 38(6): 1-5.
[2] 李白, 鲁军勇, 谭赛, 等. 滑动电接触界面粗糙度对电枢熔化特性的影响[J]. 电工技术学报, 2018, 33(7): 1607-1615.
Li Bai, Lu Junyong, Tan Sai, et al.Effect of interfacial roughness of sliding electrical contact on the melting characteristics of armature[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(7): 1607-1615.
[3] 杜佩佩, 鲁军勇, 冯军红, 等. 电磁轨道发射器电磁结构耦合动态发射过程数值模拟[J]. 电工技术学报, 2020, 35(18): 3802-3810.
Du Peipei, Lu Junyong, Feng Junhong, et al.Numeri- cal simulation of dynamic launching process of electromagnetic rail launcher with electromagnetic and structural coupling[J]. Transactions of China Electrotechnical Society, 2020, 35(18): 3802-3810.
[4] 朱博峰, 鲁军勇, 张晓, 等. 大容量脉冲电容器放电起始阶段晶闸管电压高频振荡机理研究[J]. 电工技术学报, 2020, 35(6): 1272-1278.
Zhu Bofeng, Lu Junyong, Zhang Xiao, et al.Study on the high frequency voltage oscillation of thyristor during the initial stage of pulse capacitor discharge[J]. Transactions of China Electrotechnical Society, 2020, 35(6): 1272-1278.
[5] 阮景煇, 陈立学, 夏胜国, 等. 电磁轨道炮电流分布特性研究综述[J]. 电工技术学报, 2020, 35(21): 161-169.
Ruan Jinghui, Chen Lixue, Xia Shengguo, et al.A review of current distribution in electromagnetic railguns[J]. Transactions of China Electrotechnical Society, 2020, 35(21): 161-169.
[6] Nearing J C, Huerta M A.Skin and heating effects of railgun current[J]. IEEE Transactions on Magnetics, 1989, 25(1): 381-386.
[7] 肖铮. 电枢—轨道载流滑动接触面摩擦磨损研究[D]. 武汉: 华中科技大学, 2012.
[8] Ghassemi M, Barsi Y M.Effect of liquid film (indium) on thermal and electromagnetic distribution of an electromagnetic launcher with new armature[C]// IEEE 2004 12th Symposium on Electromagnetic Launch Technology, Snowbird, UT, USA, 2004: 386-392.
[9] 杨玉东, 王建新, 薛文. 轨道炮速度趋肤效应的分析与仿真[J]. 强激光与粒子束, 2011, 23(7): 1965-1968.
Yang Yudong, Wang Jianxin, Xue Wen.Simulation and analysis of velocity skin effect of railgun[J]. High Power Laser and Particle Beams, 2011, 23(7): 1965-1968.
[10] 杨玉东, 付成芳, 薛文, 等. 轨道与电枢间运动电磁场分布的数值计算[J]. 火炮发射与控制学报, 2014, 35(3): 1-5.
Yang Yudong, Fu Chengfang, Xue Wen, et al.Numerical calculation of movement electromagnetic field distribution between rail and armature[J]. Journal of Gun Launch & Control, 2014, 35(3): 1-5.
[11] Li Xin, Weng Chunsheng.Three-dimensional investi- gation of velocity skin effect in U-shaped solid armature[J]. Progress in Natural Science, 2008(12): 1565-1569.
[12] 殷强, 张合, 李豪杰, 等. 考虑电枢与导轨实际接触状态的电磁轨道炮膛内磁场分析[J]. 兵工学报, 2019, 40(3): 464-472.
Yin Qiang, Zhang He, Li Haojie, et al.Analysis of in-bore magnetic field in electromagnetic railgun considering the realistic armature-rail contact status[J]. Acta Armamentarii, 2019, 40(3): 464-472.
[13] 冯登, 夏胜国, 陈立学, 等. 轨道电磁发射装置中电枢装配接触压力分布的不均匀特性[J]. 高电压技术, 2015, 41(6): 1873-1878.
Feng Deng, Xia Shengguo, Chen Lixue, et al.Non- uniformity of contact pressure distribution in armature assembly for railguns[J]. High Voltage Engineering, 2015, 41(6): 1873-1878.
[14] 胡宇阳. 电磁发射小口径电枢电流熔蚀特性研究[D]. 武汉: 华中科技大学, 2017.
[15] Xia Shengguo, Chen Lixue, Xiao Zheng, et al.Effects of contact pressure concentrations in rail/armature surface at startup of a railgun launch[C]//IEEE 2012 16th International Symposium on Electromagnetic Launch Technology, Beijing, 2012: 1-5.
[16] Hsieh K T, Satapathy S, Hsieh M T.Effects of pressure-dependent contact resistivity on contact interfacial conditions[J]. IEEE Transactions on Mag- netics, 2008, 45(1): 313-318.
[17] Paul B P.Current melt-wave model for transitioning solid armature[J]. Journal of Applied Physics, 1990, 67(7): 3511-3516.
[18] Li Chengxian, Xia Shengguo, Chen Lixue, et al.Simulations on current distribution in railgun under imperfect contact conditions[J]. IEEE Transactions on Plasma Science, 2019, 47(5): 2264-2268.