Design is presented of a multiple microprocessor based discrete-time controller for a permanent magnet brushless dc motor suitable for driving an aircraft fuel pump where the motor is fed from a variable-voltage, variable-frequency source through a midpoint cycloconverter link under synchronous envelope control. After clarifying the importance of no-load communication angle, the potentially highest priority signals are identified and three discrete-time subcontrollers with asynchronous logic interface are designed to assure that signal processing is accomplished without compromise of priority over a wide speed range of operation. Subsequent building of a testbed model of the system and the formulation of a computer simulation are described. The computer model is used to make a comparison study of theoretically predicted and laboratory measured performance of the testbed drive while operated from a constant-voltage, constant-frequency (C-CF) source. Also, results of steady-state operation from a variable-voltage, variable-frequency (VV-VF) source are given.


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    Title :

    Digital controller for a cycloconverter link brushless DC motor pump drive


    Additional title:

    Digitalregelung fuer einen buerstenlosen Brennstoffpumpenantrieb mit buerstenlosem Gleichstrommotor


    Contributors:
    Gorman, S.F. (author) / Cathey, J.J. (author) / Weimer, J.A. (author)


    Publication date :

    1987


    Size :

    8 Seiten, 9 Bilder, 4 Tabellen, 9 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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