2D Modeling of Inductively Coupled Helical Flux-compression Generators—FLUXAR Systems

Novac, B.M.; Enache, M.C.; Smith, I.R.; Stewardson, H.R.

doi:10.1017/s026303460001096x

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…Once this is done, the equivalent self-inductance of the transmission line can be evaluated at any time t using: (8) with the result shown in Figure 3 (left). Note that at times when the total current approaches a null, the selfinductance is diverging, a normal result which just shows that the notion of self-inductance does not exist in the absence of a current flowing through the conductor (or in other words, if the current distribution inside the conductor is not known, the self-inductance cannot be estimated!…”

Section: )mentioning

confidence: 99%

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Filamentary modeling of pulsed high-current systems

Novac

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

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Filamentary modeling, also termed the network mesh or mesh-matrix method, has a long history and the first to use this method of analyzing electric circuits was J.C. Maxwell. In pulsed power technology, the most intensive users of this numerical modeling were those designing electromagnetic launchers and homopolar generators. The filamentary technique has been successfully applied at Loughborough along the years in a wide range of pulsed power, high-current applications, including pulsed magnetic field coils, explosively driven magnetic flux-compression generators, various electromagnetic launchers, ultrahigh magnetic field generation by single-turn coils and electromagnetic implosions and the design of various types of high-voltage air-core pulsed transformers. After an introduction into the filamentary technique, most of these applications will be detailed.

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Section: )mentioning

confidence: 99%

“…The Loughborough filamentary technique for the 2D modeling of flux-compression generators is well-known, being published 15 years ago [7][8]. More recent very detailed results are shown in Fig.…”

Section: B Explosively-driven Magnetic Flux-compressionmentioning

confidence: 99%

Filamentary modeling of pulsed high-current systems

Novac

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

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“…Even there are a few methods for this kind of FCGs, most of them are either complex or time consuming for simulation. [2][3][4][5][6][7] Therefore, the purpose of this paper is to present a simple simulation model in full detail for flux trapping cascaded FCGs, which can provide a fast and relatively accurate prediction for design purpose.…”

Section: Introductionmentioning

confidence: 99%

Fast modeling of flux trapping cascaded explosively driven magnetic flux compression generators

Wang

Zhang

Chen

et al. 2013

Review of Scientific Instruments

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To predict the performance of flux trapping cascaded flux compression generators, a calculation model based on an equivalent circuit is investigated. The system circuit is analyzed according to its operation characteristics in different steps. Flux conservation coefficients are added to the driving terms of circuit differential equations to account for intrinsic flux losses. To calculate the currents in the circuit by solving the circuit equations, a simple zero-dimensional model is used to calculate the time-varying inductance and dc resistance of the generator. Then a fast computer code is programmed based on this calculation model. As an example, a two-staged flux trapping generator is simulated by using this computer code. Good agreements are achieved by comparing the simulation results with the measurements. Furthermore, it is obvious that this fast calculation model can be easily applied to predict performances of other flux trapping cascaded flux compression generators with complex structures such as conical stator or conical armature sections and so on for design purpose.

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“…Numerical models of FT-FCGs available in open literature involve the use of 2-D analysis to write characteristic equations of the circuit. A thorough 2-D analysis is given by Novac et al in [2] and [3]. Analysis of this nature has also been used in Russian publications [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Simple Flux-Trapping FCGs Utilizing PSpice Software

Young

Neuber

Kristiansen

2010

IEEE Trans. Plasma Sci.

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A novel modeling and simulation method for fluxtrapping flux-compression generators (FT-FCGs) is presented, which utilizes PSpice circuit-simulation software to solve complex differential equations derived from circuit analysis. The primary motivation for the model development is the desire for a technique to rapidly design and prototype FT-FCGs for use as drivers in high-power microwave sources. The derivation of FT-FCG equations will be given, both in the ideal (lossless) and nonideal cases. For the nonideal case, three flux conservation coefficients are added to the equations to account for intrinsic flux loss in the circuit. Time-varying inductance curves are calculated using zero-dimensional models found in literature and adapted to fit this model. A simple FT-FCG design is used as an example to show the steps taken to complete a simulation. The same design was also fabricated and tested for comparison with predicted results from the model. A comparison of the waveforms acquired through simulation and experiment was found to result in good agreement for a given set of values for the flux conservation coefficients. A discussion of the derived equations, both lossless and nonideal, is given, as well as a discussion on the investigation of the impact of the three flux constants on the circuit. Analysis is offered on the results of this investigation, and conclusions are given on the effectiveness of this model to predict FT-FCG behavior.

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2D Modeling of Inductively Coupled Helical Flux-compression Generators—FLUXAR Systems

Cited by 15 publications

References 9 publications

Filamentary modeling of pulsed high-current systems

Filamentary modeling of pulsed high-current systems

Fast modeling of flux trapping cascaded explosively driven magnetic flux compression generators

Modeling and Simulation of Simple Flux-Trapping FCGs Utilizing PSpice Software

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