This paper describes a new VSCF system whose prime power source is a permanent magnet generator. The terminal voltage of permanent magnet generator is not controllable since the excitation is constant and the output frequency varies proportional to the engine speed. Forced turn-off frequency changers are employed as the interface between permanent magnet generator and constant frequency supply. Control laws of the VSCF system, which reduce power ratings of the system and increase efficiency in the VSCF, are established. Finally, microprocessor-based control techniques, which provide the input power factor control as well as voltage and frequency control, are described.
Force, commutated direct frequency changers for aerospace power applications
Zwangskommutierte Direktfrequenzumrichter fuer Flugzeugnetze
1987
6 Seiten, 12 Bilder, 5 Quellen
Conference paper
English
Electronic frequency changers for aircraft
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