The double duty functions of a starter/generator system offers the aircraft industry the possibility of a lighter weight airplane and the capability for direct electric start of the engine. The electric start system will also permit sustained monitoring of the engine for ground maintenance or de-flooding procedures. Power to drive the starter in the form of three phase, 115 vac is furnished by the on-board APU, the external power unit, another aircraft's electrical system or by another generator on a multi-engine aircraft. The DC Link starting system draws current from the power source which is small at the beginning of the start cycle and increases as the engine RPM builds. This feature allows other loads to remain on the AC bus during engine starts. This paper elaborates on these advantages and presents the latest concepts and test results for such systems. A time to start computer simulation was developed which is used to help the airframe manufacturer determine the best system rating and evaluate special torque/speed profiles for the starter to optimize the overall system design.
DC link VSCF starter/generator systems
Starter/Generator-Systeme mit variabler Geschwindigkeit bei konstanter Frequenz mit einer Gleichstromverknuepfung
SAE-Papers ; Oct ; 1-12
1987
12 Seiten, 14 Bilder
Conference paper
English
DC Link VSCF Starter/Generator Systems
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