Abstract The NASA Hubble Space Telescope Project is developing an active cryogenic cooling system to replace the expendable cryogen used in the NICMOS instrument. A key element of the system is the Power Conversion Electronics which converts spacecraft DC to 3-phase AC to drive a reverse-Brayton cycle refrigerator and a circulator. Additional functions include DC power distribution, health and status telemetering, and safety monitoring. A flight unit meeting these requirements while remaining within a 6.5×7.5-inch footprint and 67W power dissipation constraint, was successfully designed, built and tested within 10-months of go-ahead. State-of-the-art electronics techniques, including pulse-width modulated inverters, laminated metal core printed wiring boards, and Faraday cage containment methods were utilized. Electrical efficiencies and performance parameters are described.


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    Title :

    Design and Qualification of Flight Electronics for the HST NICMOS Reverse Brayton Cryocooler


    Contributors:
    Konkel, C. (author) / Bradley, W. (author) / Smith, R. (author)

    Published in:

    Publication date :

    2002-01-01


    Size :

    10 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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