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EN
The influence of the capacitor configuration in the pulse supply system for rail accelerators on its efficiency was investigated in the paper. Two different configurations were compared: the first with a parallel connection of capacitors and the second with a parallel-series connection. In both cases, the same number of capacitors was assumed. All other parameters of the device were kept constant, i.e. mass and dimensions of the armature, rail length and stator geometry. A field-circuit model was used to analyse numerically the transients for different capacitor configurations and voltage values. The model was verified experimentally.
EN
Dynamic characteristics for three types of railgun constructions were simulated and measured in this work. The simplest construction is the iron-less (IL) railgun, while the two other ones (IC and ICPM) have an iron-core. The iron-core permanent magnet (ICPM) railgun additionally has permanent magnets. To compare their characteristics, similar dimensions of the rails and iron cores were adopted, and the same power supply system was used. Numerical magnetic field analyses and our analytical models have been used to determine the electromagnetic parameters. They were verified experimentally. The transient states of the railguns were studied with our field-circuit mathematical model, and their results were also verified by experiments.
EN
Multivariate calculations of the electrodynamic accelerator with a permanent magnet support and a ferromagnetic core are presented in the paper. The calculations were made with using the Magnetostatic module of Maxwell/ANSYS software. The purpose of these calculations was to determine the size and location of permanent magnets in terms of maximizing the force acting on the projectile. In the presented paper, three cases have been analyzed. In order to perform a comparative analysis of the obtained results of calculations, dimensions of the rails, projectile and outer dimensions of the core were kept constant.
EN
The construction of the measurement stand for investigating the electrodynamic accelerators parameters have been presented in the paper. Selected methods of measuring various physical quantities, as well as methods for protecting circuits from the damage have been described. The significant part of the work is the presentation of problems associated with the testing of electrodynamic accelerators.
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