Dual-range drive configurations for synchronous and induction generators

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4382188
SERIAL NO

06235354

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention is a dual-range drive system for synchronous and induction generators which may provide primary power for aircraft systems. In a first embodiment, utilization of a toroidal drive (10) in combination with a planetary drive (37) enables variable speed mechanical output from an engine (24) to be converted to a dual range mechanical input to a permanent magnet generator (26) such that the generator (26) operates at constant frequency over a preselected engine speed range and at a frequency proportional to speed over speed ranges below said preselected range. Drive logic (42), roller actuator (46) and steering control mechanism (48) form parts of a control system for steering or tilting the drive rollers (12) of the toroidal drive (10). The substitution of a 'differential' toroidal drive (30) for the 'straight' toroidal drive (10) enables the drive to operate in a dual-range in much the same manner, except that utilization of the differential toroidal drive (30) makes it possible to rotate the output shaft (74) in either direction. Both dual-range toroidal drive systems (10) and (30) provide means for altering the speed of the output shafts (76) and (74) respectively. The dual-range drive systems (10) and (30) are capable of operating with other power sources, such as an induction generator (102), and by utilization of power electronics (116), start panels (118), and start logic (120) are readily adaptable for operation of the generators (26), (88) and (102) in a starter mode.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
LOCKHEED CORPORATIONBETHESDA, MD5

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cronin, Michael J Sherman Oaks, CA 28 1052

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Sundstrand Corporation (1)
* 4315442 Aircraft generator starter-drive 26 1980
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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9022889 Electromotive drives 7 2013
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9365203 Systems and methods for control of transmission and/or prime mover 0 2014
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Grumman Aerospace Corporation (1)
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Sundstrand Corporation (3)
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* Cited By Examiner