Prime-mover dynamo plants – Electric control – Starting and generating dynamo
Patent
1989-03-22
1991-07-02
Pellinen, A. D.
Prime-mover dynamo plants
Electric control
Starting and generating dynamo
290 46, F02N 1104
Patent
active
050288032
ABSTRACT:
This invention relates to an integrated drive generator of the type employed onboard aircraft for power generation and prime mover starting. Prior art integrated drive generators which provided for a prime mover starting mode drove a prime mover through a constant speed transmission in order to provide motive power to the engine. The present invention provides a power path for prime mover starting which couples the motor/generator directly to the prime mover and decouples the motor/generator from the transmission by means of properly oriented one-way clutches. The integrated drive generator includes in combination in input/output shaft, and motor/generator having a rotor shaft, a constant speed transmission having an input and an output, a start power path coupling the motor/generator rotor shaft to the input/output shaft whereby the motor/generator, functioning as a motor, drives the input/output shaft as an output shaft, bypassing the transmission, to thereby start the prime mover coupled to the input/output shaft, and a generate power path coupling the input/output shaft to the transmission input and coupling the transmission output to the motor/generator rotor shaft whereby the prime mover drives the motor/generator as a generator at constant speed through the input/output shaft, functioning as an input shaft, and the transmission to produce constant frequency electrical power from the motor/generator for aircraft electrical equipment.
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Duncanson Jr. W. E.
Hitt David H.
Pellinen A. D.
Sundstrand Corporation
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