Transcription of Spacecraft Power Systems - MIT OpenCourseWare
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Spacecraft Power Systems - MIT OpenCourseWare
Spacecraft Power Systems David W. Miller John Keesee Electrical Power system EPS. Power energy Power Power Regulation Source Storage Distribution and Control Power Sources Primary Batteries Radioisotope Secondary Battery Thermionic converter Fuel cell Thermoelectric converter Regenerative fuel cell Photovoltaic Chemical dynamic Solar dynamic Nuclear Flywheel Storage Electrodynamics Tethers Propulsion-charged tether Power Source Applicability 100. NUCLEAR THERMIONICS. SOLAR DYNAMIC AND. FUEL CELL PHOTOVOLTAIC. NUCLEAR. LOAD Power (kW). 10. CHEMICAL. DYNAMIC. (APUs) NUCLEAR THERMIONIC. OR SOLAR DYNAMIC. PHOTOVOLTAIC OR. 1 ISTOTOPE - THERMOELECTRIC. PRIMARY MONTHS YEARS. BATTERIES. 1 DAY 10 DAYS 1 2 3 6 12 2 4 6 810. 1 10 100 103 104 105. HOURS. Approximate ranges of application of different Power sources. Design Space for RTGs 107. 106.
DET Power Regulation Systems • Direct Energy Transfer (DET) systems dissipates unneeded power – Typically use shunt resistors to maintain bus voltage at a predetermined level – Shunt resistors are usually at the array or external banks of resistors to avoid internal heating • Typical for systems less than 100 W
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