US Patent No: 4,382,188

Number of patents in Portfolio can not be more than 2000

Dual-range drive configurations for synchronous and induction generators

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
LOCKHEED CORPORATIONBETHESDA, MD206

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cronin, Michael J Landenberg, PA 28 868

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Sundstrand Corporation (1)
4,315,442 Aircraft generator starter-drive 25 1980

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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7,540,818 Continuously variable planetary gear set 32 2007
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8,398,518 Continuously variable transmission 3 2008
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8,317,651 Assemblies and methods for clamping force generation 9 2009
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8,622,866 Continuously and/or infinitely variable transmissions and methods therefor 0 2012
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NSK LTD. (4)
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6,251,038 Continuously variable transmission unit 30 1999
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KAWASAKI JUKOGYO KABUSHIKI KAISHA (3)
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Sundstrand Corporation (3)
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4,736,151 Bi-directional buck/boost DC/DC converter 82 1986
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ULRICH ROHS (2)
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C.E. NIEHOFF & CO. (1)
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Dellcom Aviation Inc. (1)
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Grumman Aerospace Corporation (1)
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HAMILTON SUNDSTRAND CORPORATION (1)
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MAZDA MOTOR CORPORATION (1)
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The English Electric Company Limited (1)
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TOROTRAK (DEVELOPMENT) LIMITED (1)
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Other [Check patent profile for assignment information] (3)
4,585,949 Method of and apparatus for shaft power generation 5 1984
4,682,511 Gear assisted continuously variable transmission 12 1985
RE33126 Gear assisted continuously variable transmission 5 1988