Controlled starting method for a gas turbine engine
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United States of America Patent
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Jun 27, 1995
Grant Date -
N/A
app pub date -
May 12, 1993
filing date -
May 12, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method of controllably starting a prime mover, such as a gas turbine engine for an aircraft, in which the prime mover is coupled to a synchronous machine operable in a generating mode in which the synchronous machine converts motive power generated by the prime mover into electrical power and in a starting mode in which the synchronous machine provides motive power to the prime mover to accelerate the prime mover to self-sustaining speed includes three controlled phases: a pre-ignition phase, an ignition phase, and a torque augmentation phase. During each phase the prime mover is accelerated at a predetermined rate. When the motive power provided by the synchronous machine falls below a predetermined level, its operation is converted from its starting mode to its generating mode.
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