Studies of high-power solar electric propulsion systems (i.e., tens to hundreds of kilowatts) suggest that significant mass savings may be realized by implementing direct-drive power systems. The National Direct-Drive Testbed was established to address issues associated with implementation of direct drive, and experimental results at power levels up to 10 kW are reported here. Hall thruster operation and control were shown to be simple and no different from that for operation on conventional power supplies. Thruster oscillations were the same as those for conventional power supplies, did not adversely affect solar array operation, and were independent of filter capacitance from 8 to 80 μ F . Solar array current and voltage oscillations were very small compared to their mean values and showed a modest dependence on capacitor size. Significantly, no instabilities or anomalous behavior were observed in the thruster or power system at any operating condition investigated, including near and at the array peak power point. Thruster startup using the anode propellant flow as the power “switch” was shown to be simple and reliable, with system transients mitigated by the proper selection of filter capacitance size. A simple electrical circuit model was developed and is shown to have good agreement with the experimental data.


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    Titel :

    Experimental Investigation of a Direct-Drive Hall Thruster and Solar Array System


    Beteiligte:
    Snyder, John Steven (Autor:in) / Brophy, John R. (Autor:in) / Hofer, Richard R. (Autor:in) / Goebel, Dan M. (Autor:in) / Katz, Ira (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2014-01-17


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Experimental Investigation of a Direct-drive Hall Thruster and Solar Array System at Power Levels up to 10 kW

    Snyder, John S. / Brophy, John R. / Hofer, Richard R. et al. | NTRS | 2012


    Direct Drive Hall Thruster System Development

    Hoskins, W. Andrew / Homiak, Daniel / Cassady, R. Joseph et al. | NTRS | 2003


    Hall thruster direct drive demonstration

    Hamley, John / Sankovic, John / Lynn, Peter et al. | AIAA | 1997