Stepper motors operating at liquid helium temperature have multiple applications in cryogenically-cooled telescopes such as the Shuttle Infrared Telescope Facility (SIRTF). These SIRTF applications include driving cryogen flow valves, operating the Multiple Instrument Chamber (MIC) beam splitter mechanism, and operating filters and grating wheel mechanisms in the scientific instruments. The positional repeatability of the beam splitter drive mechanism is especially critical since it feeds the optical beam to the scientific instruments. Despite these important applications, no significant data on the positional repeatability of stepper motors at cryogenic temperatures has been available. Therefore, we conducted a series of measurements to determine the positional repeatability of a modified, off-the-shelf Berger/Lahr stepper motor (model RDM 253/25, step angle 3.6 deg) which had demonstrated excellent performance in previous endurance testing at LHe temperature. These test results indicated that the positional repeatability of the motor was excellent at all temperatures, with somewhat better performance at cryogenic temperatures. Another important result was that the motor could be repeatedly turned off and on while still accurately retaining its rotor position.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Positional repeatability measurements of stepper motors at cryogenic temperatures


    Weitere Titelangaben:

    Die Positionierungsgenauigkeit von Schrittmotoren fuer kryogene Steuerungssysteme in Raumfahrzeugen


    Beteiligte:
    Pompea, S.M. (Autor:in) / Hall, M.S. (Autor:in) / Bartko, F. (Autor:in) / Houck, J.R. (Autor:in)


    Erscheinungsdatum :

    1983


    Format / Umfang :

    7 Seiten, 5 Bilder, 2 Tabellen, 3 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Stepper Motors: Principles and Characteristics

    Cooke, J R | SAGE Publications | 1988


    Torque Ripple Minimization in Hybrid Stepper Motors Using Acceleration Measurements

    ANTONELLO, RICCARDO / CENEDESE, ANGELO / OBOE, ROBERTO | BASE | 2011

    Freier Zugriff

    High-performance stepper motors for space mechanisms

    Sega, P. / European Space Agency| Swiss Space Industries | British Library Conference Proceedings | 1995


    High-performance stepper motors for space mechanisms

    Sega, P. / Paris, F. | British Library Online Contents | 1995