This paper describes the control of a pulse width modulated (PWM) type sequential shunt switching unit (SSU) for spacecraft applications. It is found that the solar cell output capacitance has a significant impact on SSU design. Shorting of this cell capacitance by the PWM switch causes input current surges. These surges are minimized by the use of a series filter inductor. The system with a filter is analyzed for ripple and the control to output-voltage transfer function. Stable closed loop design considerations are discussed. The results are supported by modeling and measurements of loop gain and of closed-loop bus impedance on test hardware for NASA's 120 V Earth Observation System (EOS). The analysis and modeling are also applicable to NASA's 160 V Space Station power system.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Design and Test Hardware for a Solar Array Switching Unit


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Patil, A. R. (Autor:in) / Cho, B. H. (Autor:in) / Sable, D. (Autor:in) / Lee, F. C. (Autor:in)

    Kongress:

    27th Intersociety Energy Conversion Engineering Conference (1992) ; 1992



    Erscheinungsdatum :

    1992-08-03




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    10 kW solar array switching unit performance test results

    Fleck, G.W. / Lepisto, J.W. / Forkosh, M. | Tema Archiv | 1985




    Solar array switching power management

    Cassinelli, J. E. / Smith, L. D. / Valgora, M. | NTRS | 1982


    A Novel Active Ripple Filter for the Solar Array Shunt Switching Unit (SSU)

    Moon, M. / Cho, B. / Patil, A. et al. | British Library Conference Proceedings | 1994