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- W2418389443 abstract "An electric propulsion vehicle designed to transport cargo in support of a piloted expedition to Mars will require electrical power in the range of megawatts. This paper summarizes an evaluation of various megawatt-class power processing unit (PPU) design and technology options for high-power nuclear electric propulsion (NEP) vehicles using turboalternators and advanced magnetoplasmadynamic (MPD) thrusters. A baseline system uses a low-voltage turboalternator, rectifiers and thrusters. However, there are other options. Four such design and technology options with the potential of improving overall system efficiency and reducing cabling mass are analyzed. The first option uses high-voltage AC from a wye-connected turboalternator and a step-down transformer, the second option uses a six-phase star-connected turboalternator instead of the wye-connected alternator in the baseline configuration, the third option uses PPU rectifier electronics located near the thrusters with a remotely-located radiator, and the fourth option uses cryogenic power conversion electronics and cabling to reduce losses. It is found that the third option has the potential of providing maximum overall power conversion efficiency and reducing mass. Presently, the fourth option appears to have maximum complexity of design and implementation, is costly, and is somewhat uncertain even through it can be the most attractive option in themore » future.« less" @default.
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- W2418389443 date "1995-12-31" @default.
- W2418389443 modified "2023-09-24" @default.
- W2418389443 title "Power processing unit options for high powered nuclear electric propulsion using MPD thrusters" @default.
- W2418389443 hasPublicationYear "1995" @default.
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