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Simple 2D Model for Helical Flux-compression Generators

Published online by Cambridge University Press:  09 March 2009

B.M. Novac ,
M.C. Enache ,
I.R. Smith ,
M.C. Enache  and
H.R. Stewardson
B.M. Novac
Affiliation:
Institute of Atomic Physics, IFTAR, Bucharest, Romania
M.C. Enache
Affiliation:
Institute of Atomic Physics, IFTAR, Bucharest, Romania
I.R. Smith
Affiliation:
Department of Electronic & Electrical Engineering, Loughborough University of Technology, Loughborough, Leicestershire, LEI 1 3TU, UK
H.R. Stewardson
Affiliation:
Department of Electronic & Electrical Engineering, Loughborough University of Technology, Loughborough, Leicestershire, LEI 1 3TU, UK
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Abstract

This paper presents a simple but complete 2D model for helical flux-compression generators that overcomes many of the limitations present in existing zero-dimensional models. The generator circuit is effectively decomposed into separate z and; current carrying circuits, with each of the; circuits (rings) corresponding to a different current. Use is also made of a technique by which these rings are sequentially switched out of circuit. The approach proposed opens the way to a full understanding of the behavior of cascade systems of generators inductively coupled by dynamic transformers using the so-called flux-trapping technique. In addition, the model can also yield an important insight into the phenomena that differentiates the performance of small generators when primed by a capacitor, a battery, or an externally produced magnetic field. Finally, the numerical code developed in the paper can readily be adapted to model high-energy and high-current generators in which the helical coil and the armature are of variable geometry. Valuable design information is provided on the magnetic and the electric field distributions within the generator and on the likely radial and axial movements of the stator turns.

Type
Research Article
Information
Laser and Particle Beams , Volume 15 , Issue 3 , September 1997 , pp. 379 - 395
Copyright
Copyright © Cambridge University Press 1997

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