考虑速度趋肤效应与接触电阻影响的枢轨界面电流分布特性

doi:10.19595/j.cnki.1000-6753.tces.211767

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Abstract In this paper, the current distribution of railgun is calculated by finite element method. In this paper, according to the different factors in the model, three models are established: the velocity skin effect model, the contact resistance model and the composite model. Firstly, by setting up the coordinate system on the armature and adding the velocity term to the Maxwell equations, the velocity skin effect caused by the armature motion is calculated. Secondly, the rough surface characteristics of armature and rail and the contact pressure between armature and rail are considered in the contact resistance model. Finally, a composite model is established by combining above models. By comparing and analyzing the current distribution characteristics of each model on the armature-rail interface, this paper shows that the composite model is the most accurate. It is shown that the velocity skin effect and contact resistance are the key factors affecting the performance of electromagnetic railgun.

Key words： Railgun velocity skin effect contact resistance current distribution

Received: 03 November 2021

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TM89

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	Articles by authors
	Wang Zengji
	Chen Lixue
	You Penghao
	Lan Xinyu
	Ge Yifan

Cite this article:

Wang Zengji,Chen Lixue,You Penghao等. Current Distribution Characteristics of Armature-Rail Interface under Velocity Skin Effect and Contact Resistance[J]. Transactions of China Electrotechnical Society, 2022, 37(19): 5003-5010.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211767 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I19/5003

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