NDLI: An Analytic Expression of Inductance Gradient for Rail-Type Electromagnetic Launcher

Content Provider	IEEE Xplore Digital Library
Author	Jianxin Nie Jingjing Han Qingjie Jiao Jun Li Jianfeng Qin
Copyright Year	1973
Abstract	The rail-type electromagnetic launcher (EML) has good development and applied prospects for military and civilian dual purpose. The inductance gradient is an important parameter to design the EML structure and evaluate the system performance. Based on the Biot-Savart law and current skin-effect behavior, we derive an analytic formula to predict the EML inductance gradient, which expands Batteh's formula by introducing rail thickness w and skin depth δ. Our expression is more accurate because the geometrical parameters of both rails and armature are considered in this paper. We investigate the inductance gradient change as a function of the ratio of bore width to height s/h_a, rail thickness w, and two-rail interval s. Finally, our results at different scales are compared with those of other formulas of the inductance gradient. This paper could be used directly to design and optimize the rail-type EML.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	931
Ending Page	934
Page Count	4
File Size	514813
File Format	PDF
ISSN	00933813
Volume Number	39
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rails Inductance Current distribution Skin Force Skin effect Conductors skin effect Armature electromagnetic launcher (EML) inductance gradient rail
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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Numerical Analysis of a Rail Launcher With a Multilayered Armature

Effect of Rail Tapering on the Inductance Gradient Versus Armature Position by 3D-FEM

Effect of Armature and Rails Resistivity Profile on Rail’s Electromagnetic Force and Armature Velocity

Effect of rail/armature geometry on current density distribution and inductance gradient

Dynamic Performances of the Electromagnetic Rail Launcher

Inductance Gradient Variation With Time and Armature Sliding Along the Rails

Simulation and Test Study of Bores of Different Structures of Electromagnetic Launcher

A Bond Graph Model of an Electromagnetic Launcher—Part 1: Structure and Details

Physical Principle and Relevant Restraining Methods About Velocity Skin Effect

An Analytic Expression of Inductance Gradient for Rail-Type Electromagnetic Launcher

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Effect of Armature and Rails Resistivity Profile on Rail’s Electromagnetic Force and Armature Velocity

Effect of rail/armature geometry on current density distribution and inductance gradient

Dynamic Performances of the Electromagnetic Rail Launcher

Inductance Gradient Variation With Time and Armature Sliding Along the Rails

Simulation and Test Study of Bores of Different Structures of Electromagnetic Launcher

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