Analysis of induction-type coilgun performance based on cylindrical current sheet model

He, Jiangen; Levi, E.; Zabar, Z.; Birenbaum, L.; Naot, Y.

doi:10.1109/20.101098

Cited by 77 publications

(19 citation statements)

References 9 publications

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“…The same choice can be made for the current distributions in the barrel [10]. Under these hypotheses there are two surface current densities (A/m) in both the and directions located at an effective radius and , respectively, as shown in Fig.…”

Section: Mathematical Modelmentioning

confidence: 93%

Gyroscopic stabilization of launch package in induction type coilgun

Becherini¹

2001

IEEE Trans. Magn.

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The aim of this paper is to study the problem of gyroscopic stabilization of the launch package in induction type coilguns. This result can be obtained by utilizing a double-feed induction coilgun which provides rotation to the launch package while it is accelerating. Such launcher is comprised of two coils, one generating a travelling magnetic field (and consequently the axial acceleration) the other a rotating magnetic field for the rotation of the projectile. Electromagnetic analysis, based on a cylindrical sheet current model, allows one to determine, as a function of the two slips (in the translation motion and in the rotation motion) all the electric, magnetic and mechanical quantities. Thermal and mechanical stress are determined too. Finally the results for a launcher, in which a 2 kg projectile is accelerated, are reported. For this application time dependence of the principal electromechanical quantities are shown. A comparison with the same launcher running as a linear induction launcher is developed too.Index Terms-Gyroscopic stabilization of the projectile, induction coilgun.

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Section: Mathematical Modelmentioning

confidence: 93%

Gyroscopic stabilization of launch package in induction type coilgun

Becherini¹

2001

IEEE Trans. Magn.

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“…Haghmaram and Shoulaie present a literature review of the available methods to analyze the air-cored tubular linear induction motors used in electromagnetic launcher applications with a strong emphasis on the LIL [18]. By considering the arguments in [18], the most popular methods for modeling and analysis of the traveling magnetic wave linear induction launcher can be classified as Current Sheet Method [19][20], Mesh Matrix Method [21][22], Wavelet Transform [23], and Finite Element Method [24][25]. All the FEM models available in the literature for the LIL are two-dimensional.…”

Section: D Fem Modeling and Simulationmentioning

confidence: 99%

3D FEM analysis of a novel magnetic levitation system

Hasırcı

Balıkçı

Zabar

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

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This paper deals with the 3D FEM analysis of a novel magnetic levitation (maglev) train driven by an air-cored tubular linear induction motor. This new maglev system originates from Electromagnetic Launcher (EML) technology, especially the Linear Induction Launcher (LIL) type. Some 2D magnetic analyses based on current sheet model or transmission line approach for the LIL type launchers are available in the literature but this paper provides an alternative way to analyze LIL type of EMLs by using 3D Finite Element Method (FEM). The analysis examines into the variation of propulsion, levitation, and guidance forces induced in the moving part. It is expected that the possible results of this magnetic analysis will lead some new and important design considerations for the novel maglev system.

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“…This launcher is an induction device and as a consequence is free from the drawbacks related to the sliding contacts that affect the rail ones. With respect to the conventional Linear Induction Launcher (LIL), it is characterized by a better ratio of the radial compression force to the axial thrust force [3]. Currents in the armature of LIL are induced by the variation of the axial component of the flux density, but this component of the flux density produce an intense radial force.…”

Section: Introductionmentioning

confidence: 99%

Analytical model of a travelling wave multipole field electromagnetic launcher

Musolino

Rizzo

Tripodi

2012

2012 16th International Symposium on Electromagnetic Launch Technology

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The problem of the evaluation of eddy currents induced in a conductive cylinder is here reconsidered under the light of possible application in the electromagnetic launch context. In particular we derive an analytical solution when the system is excited by a sinusoidal current flowing on a saddle coil moving in the axial direction. Subsequently we consider an arrangement of such coils distributed in the axial and azimuth direction. When properly fed they produce a travelling wave of flux distribution which is able to exert a thrust force on the conductive cylinder. Since the governing vector field equation is not separable in the cylindrical coordinate, an approach based on the second order vector potential (SOVP) formulation has been here adopted. Scalar field equations are obtained whose solutions are expressed in terms of Bessels function.

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Analysis of induction-type coilgun performance based on cylindrical current sheet model

Cited by 77 publications

References 9 publications

Gyroscopic stabilization of launch package in induction type coilgun

Gyroscopic stabilization of launch package in induction type coilgun

3D FEM analysis of a novel magnetic levitation system

Analytical model of a travelling wave multipole field electromagnetic launcher

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