Comparison of two railgun power supply architectures to quantify the energy dissipated after the projectile leaves the railgun
Stewart, Mitchell C.
Julian, Alexander L.
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Railgun muzzle flash, or post-fire arcing, is a major concern to the Navy because of the potential associated thermal stresses. In this thesis, we compared two railgun power supplies in Matlab Simulink to quantify their associated post-fire energy. When the armature exits the rails, a finite energy from the railgun pulsed-power supply is inductively stored in the rails and discharges at the muzzle. This energy, which is due to the loss of the low-voltage electrical contact that is ordinarily between the armature and the rail, is forced by the system inductance to flow as an electrical discharge, creating a muzzle flash. Quantification of this post-fire rail energy in our simulation from both the existing railgun power supply and the proposed power supply--a thyristor-based power supply versus a buck-boost converter, respectively--reveals that the buck-boost converter topology is better suited for the railgun, particularly at minimizing the post-fire muzzle energy. The minimization of the post-fire energy allows for an extended rail life and potentially longer usage.
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Feliciano, Allan S. (Monterey, California. Naval Postgraduate School, 2001-12);A naval electromagnetic railgun would be a considerable asset against a littoral environment. By accelerating projectiles to 3 km/s, a naval railgun would be capable of reaching 300-400 nautical miles. Problems such as ...
Oriti, Giovanna; Stewart, Mitchell (2016);Railgun muzzle flash, or post-fire arcing, is a major concern to the Navy because of the potential thermal stress associated with post-fire arcing. In this project a new railgun power supply was compared to the thyristor-based ...
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