NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
topex electrical power systemThe TOPEX mission requirements which impact the power requirements and analyses are presented. A description of the electrical power system (EPS), including energy management and battery charging methods that were conceived and developed to meet the identified satellite requirements, is included. Analysis of the TOPEX EPS confirms that all of its electrical performance and reliability requirements have been met. The TOPEX EPS employs the flight-proven modular power system (MPS) which is part of the Multimission Modular Spacecraft and provides high reliability, abbreviated development effort and schedule, and low cost. An energy balance equation, unique to TOPEX, has been derived to confirm that the batteries will be completely recharged following each eclipse, under worst-case conditions. TOPEX uses three NASA Standard 50AH Ni-Cd batteries, each with 22 cells in series. The MPS contains battery charge control and protection based on measurements of battery currents, voltages, temperatures, and computed depth-of-discharge. In case of impending battery depletion, the MPS automatically implements load shedding.
Document ID
19920067907
Document Type
Conference Paper
Authors
Chetty, P. R. K.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Roufberg, Lew
(Fairchild Space Co. Germantown, MD, United States)
Costogue, Ernest
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
SPACECRAFT PROPULSION AND POWER
Meeting Information
IECEC ''91: Intersociety Energy Conversion Engineering Conference(Boston, MA)
Funding Number(s)
CONTRACT_GRANT: JPL-957849
Distribution Limits
Public
Copyright
Other