Transient performance of linear induction launchers fed by generators and by capacitor banks

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

doi:10.1109/20.101099

Cited by 34 publications

(10 citation statements)

References 6 publications

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“…Therefore, we can recognize that the sleeve to be divided, longitudinally, into a number of zones, electrically insulated from one another, and each zone is represented as a separate projectile coil. There are three factors involved in modeling a linear induction launcher: electrical, thermal, and dynamic [13]- [15]. As can be seen from the mesh-matrix method, the system state equations which describe the launcher system are given by…”

Section: A System State Equationsmentioning

confidence: 99%

Performance of a Four-section Linear Induction Coil Launcher Prototype

Li¹,

Wang²,

Wang³

et al. 2014

IEEE Trans. Appl. Supercond.

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To improve the pulse capacitor-powered linear induction electromagnetic launcher system kinetic energy conversion efficiency, and promote development in the large mass projectile, high-speed launch requirements, this paper establishes the multi-section linear induction electromagnetic launcher model. A multi-section linear induction launcher experiment platform was built and the test was carried out. According to the principles of the mesh-matrix method, a lumped parameter transient physical and numerical model for the analysis of the dynamic conditions was built. The simulation code was programmed by MATLAB for the capacitor-driven launcher. Simulating the coil launcher by the code, one can draw the three-phase voltages and currents of the drive coils and the voltages and currents rings of the projectile, temperature of the drive coils and the rings of the projectile with respect, curves of the acceleration, force, and position of the projectile. A four-section linear induction launcher experiment bench was designed and established. Pulsed capacitor bank was used as the energy stored components. Each phase has a Spark-gap switch which, when closed, connects its portion of the capacitor bank to the coils, initiating the ac oscillations. Central control system was build based on the chip of the digital signal processor TMS320F2812 and the PC was coordinated the normal operation of the system. Performance results for the linear induction launcher with four sections are summarized. The system used pulsed capacitor bank and coils to accelerate 320-g projectile intact up to a muzzle velocity of 392 m/s. This provides the foundation of the higher muzzle velocity coil launcher research in the next stage.Index Terms-Linear induction coil launcher, mesh-matrix, projectile, pulsed capacitor, spark-gap switch. 1051-8223

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Section: A System State Equationsmentioning

confidence: 99%

Performance of a Four-section Linear Induction Coil Launcher Prototype

Li¹,

Wang²,

Wang³

et al. 2014

IEEE Trans. Appl. Supercond.

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“…INTRODUCTION AND MOTIVATION ONSIDERABLE research attention is being given to the design of pulsed power generators for special magnetic field experiments [1], plasma ion implantation [2], rail guns [3], X ray simulators [4], and electromagnetic launchers [5] [6]. The unique feature of pulsed power machines is that they function in a transient regime.…”

mentioning

confidence: 99%

Transient performance and loss analysis in solid wound rotor pulsed power generators

Davey

2006

IEEE Trans. Magn.

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Abstract-High rotation speed is the key to enhanced power density in rotating machines. High speed, shock, and construction considerations argue for solid rotors. However, output transient voltage requirements cause concern that changes in the field current will not be registered quickly in the stator. Different techniques are considered for estimating the machine time constant, including an analytic solution of a smooth air gap machine, and a transfer relation solution based on time harmonic solutions. An empirical solution and an equivalent surface current approach are discussed for predicting the loss in the rotor. These solutions compare favorably to rotational transient finite element solutions.

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“…We can understand the reasons for most of the departures from the sinusoidal stesdy-state model by taking into account four hurdles that prevent its attainment: (1) single phasing, (2) fiequency mixing, (3) damping, and (4) sectionalization [23]. CS model gives the limiting performance for a launcher with an infinite number of coils and no end effects due to finite armature length, therefore Full transient analysis [24], [25] is often necessary in order to predict accurately the performance of the whole launcher system including the power conditioner.…”

Section: B Transient Analysismentioning

confidence: 99%

“…Transient performance of both generator-driven and capacitor driven coilguns was investigated as a function of the firing sequence of switching elements and connections of drive coils [53]. In general, it is difficult to achieve a smooth transition between one section and the next.…”

Section: Power Conditioningmentioning

confidence: 99%

“…Therefore, the initiation of the sinusoidal current oscillation coincides with the switch-on time. They are ideally suited for short-time, high acceleration operation, but they are likely to require higher operating voltages than the generatordriven ones, because of the constraint imposed on the capacitance by the re"nce condition with attenuation [25]. Reference [3] described the power conditioning scheme for a LIL as an open-loop integrated system.…”

Section: A Capacitor Driven Coiigunsmentioning

confidence: 99%

See 1 more Smart Citation

Study of traveling wave tubular linear induction motors

Haghmaram

Shoulaie²

2004 International Conference on Power System Technology, 2004. PowerCon 2004.

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In this paper, we review some major research results in Traveling Wave Tubular Linear Induction Motors technology, based on 'open literature"publications, which were obtained in the world in the last decades. One database analysis shows that coil launchers are covered in 68 of over 1000 electromagnetic launcher papers published, referred to 53 of them in this paper. The research program includes studies of history, types, applications, theories and analysis, design, and power conditioning of coil launchers with emphasising on traveling wave induction (Linear Induction Launcher) one. In the theories and analysis section, a preview i s given of current sheet model, current filament model, finite element method, and wavelet transform. In the design section, local and global optimisation algorithms and designing results is reviewed. In the fmal section, we review power conditioning of Capacitor Driven Coilguns and Generator Driven Coilguns, and concepts of "Magnetic Flux Compression" for generating pulses required to efficiently drive the coil launchers and LLDouMc+Fed Induction Launchers".

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Transient performance of linear induction launchers fed by generators and by capacitor banks

Cited by 34 publications

References 6 publications

Performance of a Four-section Linear Induction Coil Launcher Prototype

Performance of a Four-section Linear Induction Coil Launcher Prototype

Transient performance and loss analysis in solid wound rotor pulsed power generators

Study of traveling wave tubular linear induction motors

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