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  • 1
    Publication Date: 1987-08-01
    Print ISSN: 1070-485X
    Electronic ISSN: 1938-3789
    Topics: Geosciences
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  • 2
    Publication Date: 2019-06-28
    Description: Generic power-system elements and their potential faults are identified. Automation functions and their resulting benefits are defined and automation functions between power subsystem, central spacecraft computer, and ground flight-support personnel are partitioned. All automation activities were categorized as data handling, monitoring, routine control, fault handling, planning and operations, or anomaly handling. Incorporation of all these classes of tasks, except for anomaly handling, in power subsystem hardware and software was concluded to be mandatory to meet the design and operational requirements of the space station. The key drivers are long mission lifetime, modular growth, high-performance flexibility, a need to accommodate different electrical user-load equipment, onorbit assembly/maintenance/servicing, and potentially large number of power subsystem components. A significant effort in algorithm development and validation is essential in meeting the 1987 technology readiness date for the space station.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-170974 , NAS 1.26:170974 , MCR-83-645
    Format: application/pdf
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  • 3
    Publication Date: 2019-07-12
    Description: Simple configuration for wiring of multiple parallel-connected switching transistors minimizes stray wiring inductance while providing for use of balancing transformers, which equalize currents in transistors. Currents balanced on twisted pairs of wires. Because twisted pairs carry both "hot-side" and return currents, this configuration has relatively low inductance.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-28387 , NASA Tech Briefs (ISSN 0145-319X); 14; 10; P. 30
    Format: text
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