Design, analysis and construction of a high voltage capacitor charging supply
Tyler, Nathan S.
Julian, Alexander L.
Maier, William B.
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The desire to use railguns in defense applications has elevated the level of concentration in all areas of the railgun system. Necessary in any railgun is a large amount of electric power to deliver the required force to the projectile. One popular source of power is high voltage capacitor banks. The NPS Railgun Lab employs a fully functioning railgun with capacitor banks as power supplies. A reliable and safe charging supply for these capacitor banks is desirable and investigated in this paper. Construction and testing of a power supply charger is compared to simulation results. The power supply charger consists of a Voltage Source Inverter (VSI) connected to a high voltage boost transformer; the output of the transformer is connected to a voltage doubler rectifier; the output of the rectifier charges the high voltage capacitor to 9 kV in two minutes. The power supply controller is an FPGA (Field Programmable Gate Array) with embedded control to ensure the safe operation of the power supply.
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