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Numerical simulations of flux compression generator systems
KTH, Skolan för elektro- och systemteknik (EES), Rymd- och plasmafysik.
2007 (engelsk)Inngår i: Proceedings of the 20th IET Pulsed Power Symposium, 2007, s. 123-127Konferansepaper, Publicerat paper (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
2007. s. 123-127
Emneord [en]
Flux-compression generators, high-voltage generation, system simulations
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-9636OAI: oai:DiVA.org:kth-9636DiVA, id: diva2:126781
Merknad
QC 20101103Tilgjengelig fra: 2008-11-21 Laget: 2008-11-21 Sist oppdatert: 2022-06-26bibliografisk kontrollert
Inngår i avhandling
1. Experiments with and modelling of explosively driven mangetic flux compression generators
Åpne denne publikasjonen i ny fane eller vindu >>Experiments with and modelling of explosively driven mangetic flux compression generators
2008 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis presents work performed on explosively driven magnetic flux compression generators. This kind of devices converts the chemically stored energy in a high explosive into electromagnetic energy in the form of a powerful current pulse. The high energy density of the high explosives makes flux compression generators attractive as compact power sources. In order to study these devices a generator was designed at FOI in the mid-90ies. Two generators remained unused and became available for this licentiate work.

The thesis reports experiments with, and simulations of, the operation of the two remaining generators. The aim was to fully understand the performance of the generator design and be able to accurately simulate its behaviour. The generators were improved and fitted with various types of diagnostics to monitor the generator operation.

Two experiments were performed of which the first generator was operated well below its current capability limits while the second was stressed far above its limits. Since the generator generates a rapidly increasing current, a current measurement is the most important diagnostic revealing the current amplification of the generator and its overall performance. Further it is important to measure the timing of various events in the generator. With a common time reference it is possible to combine data from different probes and extract interesting information which cannot be directly obtained with a single measurement.

Two types of numerical simulations have been performed: Hydrodynamic simulations of the high explosive interaction with the armature were used to verify the measured armature dynamics. A zero-dimensional code was used to perform circuit simulations of the generator. The model takes into account the inductance reduction due to the compression of the generator as well as the change in conductivity due to heating of the conductors in the generators.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2008. s. xii, 103
Serie
Trita-EE, ISSN 1653-5146 ; 2008:53
Emneord
Magnetic Flux Compression, Explosives, Pulsed Power, Circuit Simulations, Hydrodynamic simulations
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-9638 (URN)978-91-7415-174-9 (ISBN)
Presentation
2008-11-12, Seminarierummet, Alfvénlaboratoriet, KTH, Teknikringen 31, Stockholm, 10:00 (engelsk)
Veileder
Merknad
QC 20101103Tilgjengelig fra: 2008-11-21 Laget: 2008-11-21 Sist oppdatert: 2022-06-26bibliografisk kontrollert
2. Gigawatt pulsed power technologies and applications
Åpne denne publikasjonen i ny fane eller vindu >>Gigawatt pulsed power technologies and applications
2011 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2011. s. x, 85
Serie
Trita-EE, ISSN 1653-5146 ; 2011:034
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-33034 (URN)978-91-7415-962-2 (ISBN)
Disputas
2011-05-20, sal F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC 20110502Tilgjengelig fra: 2011-05-02 Laget: 2011-04-27 Sist oppdatert: 2022-06-24bibliografisk kontrollert

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