Preliminary design of the PANSAT electrical-power subsystem. Master's thesis
This thesis presents a preliminary design of the electrical power system (EPS) for the Naval Postgraduate School's Petite Amateur Navy Satellite (PANSAT). The EPS is a photovoltaic silicon cell system consisting of solar array, batteries, battery charge regulator (BCR), and dc-dc convertors. The EPS provides power for up to two years of low earth orbit (480 km) operations. The solar array consists of 17 panels with thirty-two 2 {times} 4 cm solar cells in series on each panel. The cells have an efficiency of 14.3% and generate a panel voltage of 14.1 volts at beginning of life, providing an unregulated bus voltage of 13.5 volts. The bus voltage is clamped at a minimum 10.5 volts by two lead acid batteries in parallel with the bus. Each battery consists of five 2.1 volt, 5 ampere-hour lead acid cells and is capable of meeting mission requirements. The BCR monitors individual battery voltage, an indication of reserve capacity, and provides a pulse-modulated charge current alternately to each battery.
- Research Organization:
- Naval Postgraduate School, Monterey, CA (United States)
- OSTI ID:
- 5360779
- Report Number(s):
- AD-A-236911/4/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140600* -- Solar Energy-- Photovoltaic Power Systems
CURRENTS
DC TO DC CONVERTERS
DESIGN
DIRECT CURRENT
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC BATTERIES
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRIC POWER
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC EQUIPMENT
ENERGY EFFICIENCY
EQUIPMENT
LEAD-ACID BATTERIES
MEASURING INSTRUMENTS
MONITORING
MONITORS
PANELS
PHOTOELECTRIC CELLS
PHOTOELECTROMAGNETIC EFFECTS
PHOTOVOLTAIC CELLS
PHOTOVOLTAIC EFFECT
PHOTOVOLTAIC POWER SUPPLIES
POWER
POWER SUPPLIES
SATELLITES
SERVICE LIFE
SILICON SOLAR CELLS
SOLAR CELL ARRAYS
SOLAR CELLS
SOLAR EQUIPMENT