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.
Digital controller for a cycloconverter link brushless DC motor pump drive
Digitalregelung fuer einen buerstenlosen Brennstoffpumpenantrieb mit buerstenlosem Gleichstrommotor
1987
8 Seiten, 9 Bilder, 4 Tabellen, 9 Quellen
Conference paper
English
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