US6914410B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric differential traction-control drive system
Assignee: GM Global Technology Operations LLC
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Filing: 2003-06-27
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Granted: 2005-07-05
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Expires: 2023-06-27
Abstract
Abstract In an electrical drive system, an electric differential comprises a first rotor for driving a first drive wheel, a second rotor for driving a second drive wheel, the first and second rotors capable of independent relative rotation, and a common stator for driving the first and second rotors. The common stator may comprise a single winding for driving both rotors or first and second windings for driving the first and second rotors respectively. A processor and a sensor system monitor parameters such as torque, speed, magnetic flux, etc. to detect the loss of traction by one or both drive wheels and adjust the operation of the motor until traction is regained.
Inventors
- 👤 John C. Morgante
- 👤 Theodore E. Demers
- 👤 Daniel D. Richey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:49
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/048
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
61 words
A motor, comprising: a common stator having a cavity formed therethrough; a first rotor at least partially disposed within said cavity, said first rotor differentially driven by said common stator; and a second rotor at least partially disposed within said cavity and capable of independent rotation with respect to said first rotor, said second rotor differentially driven by said common stator.
Claim 2
Dependent Claim
61 words
A motor, comprising: a common stator having a cavity formed therethrough; a first rotor at least partially disposed within said cavity, said first rotor differentially driven by said common stator; and a second rotor at least partially disposed within said cavity and capable of independent rotation with respect to said first rotor, said second rotor differentially driven by said common stator.
Claim 3
Dependent Claim
21 words
A motor according to claim 1 wherein said common stator includes a single winding for activating said first and second rotors.
Claim 4
Dependent Claim
23 words
A motor according to claim 1 wherein said common stator comprises first and second windings for driving said first and second rotors respectively.
Claim 5
Dependent Claim
93 words
An electric drive system, comprising: first means for producing electrical energy; a first and a second drive wheels; and a motor, comprising; a common stator having a cavity formed therethrough; a first rotor for driving said first drive wheel, said first rotor disposed at least partially within said cavity; a second rotor for driving said second drive wheel, said second rotor disposed at least partially within said cavity, said first and second rotors capable of independent relative rotation; and generating means for driving said first and second rotors coupled to said common stator.
Claim 6
Dependent Claim
93 words
An electric drive system, comprising: first means for producing electrical energy; a first and a second drive wheels; and a motor, comprising; a common stator having a cavity formed therethrough; a first rotor for driving said first drive wheel, said first rotor disposed at least partially within said cavity; a second rotor for driving said second drive wheel, said second rotor disposed at least partially within said cavity, said first and second rotors capable of independent relative rotation; and generating means for driving said first and second rotors coupled to said common stator.
Claim 7
Dependent Claim
23 words
An electric drive system according to claim 4 wherein said common stator includes a single winding for energizing said first and second rotors.
Claim 8
Dependent Claim
25 words
An electric drive system according to claim 4 wherein said common stator comprises first and second windings for driving said first and second rotors respectively.
Claim 9
Dependent Claim
15 words
An electric drive system according to claim 4 wherein said first means is an inverter.
Claim 10
Dependent Claim
38 words
An electric drive system according to claim 4 further comprising a processor coupled to said inverter for altering the torque applied to one said first and second rotors relative to the other of said first and second rotors.
Claim 11
Dependent Claim
26 words
An electric drive system according to claim 8 further comprising second means for sensing the torque applied to each of said first and second drive wheels.
Claim 12
Dependent Claim
24 words
An electric drive system according to claim 8 comprising second means for sensing the speed of each of said first and second drive wheels.
Claim 13
Dependent Claim
18 words
An electric drive system according to claim 9 wherein said second means comprises a closed loop torque controller.
Claim 14
Dependent Claim
18 words
An electric drive system according to claim 10 wherein said second means comprises a closed loop speed controller.
Claim 15
Dependent Claim
142 words
An electric drive system, comprising: at least first and second drive wheels; a motor comprising: a common stator having a cavity formed therethrough; a first rotor for driving said first drive wheels, said first rotor disposed at least partially in said cavity of said common stator; a second rotor for driving said second drive wheels, said second rotor disposed at least partially in said cavity of said common stator, said first and second rotors capable of independent relative rotation; and generating means for driving said first and second rotors coupled to said common stator; a processor coupled to said motor; and at least one sensor mechanism coupled to said processor for providing at least a first operational parameter to said processor for altering the operation of said motor to improve traction of at least one of said first and second drive wheels.
Claim 16
Dependent Claim
142 words
An electric drive system, comprising: at least first and second drive wheels; a motor comprising: a common stator having a cavity formed therethrough; a first rotor for driving said first drive wheels, said first rotor disposed at least partially in said cavity of said common stator; a second rotor for driving said second drive wheels, said second rotor disposed at least partially in said cavity of said common stator, said first and second rotors capable of independent relative rotation; and generating means for driving said first and second rotors coupled to said common stator; a processor coupled to said motor; and at least one sensor mechanism coupled to said processor for providing at least a first operational parameter to said processor for altering the operation of said motor to improve traction of at least one of said first and second drive wheels.
Claim 17
Dependent Claim
15 words
An electric drive system according to claim 13 wherein said first operational parameter is torque.
Claim 18
Dependent Claim
15 words
An electric drive system according to claim 13 wherein said first operational parameter is speed.
Claim 19
Dependent Claim
23 words
An electric drive system according to claim 13 wherein said common stator includes a single winding for energizing said first and second rotors.
Claim 20
Dependent Claim
25 words
An electric drive system according to claim 13 wherein said common stator comprises first and second windings for driving said first and second rotors respectively.
Claim 21
Dependent Claim
21 words
An electric drive system according to claim 14 wherein said at least one sensor mechanism comprises a closed loop torque controller.
Claim 22
Dependent Claim
21 words
An electric drive system according to claim 15 wherein said at least one sensor mechanism comprises a closed loop speed controller.
Claim 23
Dependent Claim
66 words
A motor, comprising: a common stator having an inner surface defining a cavity; a first rotor shaft at least partially disposed within the cavity; a first rotor rotationally coupled to the first rotor shaft; a second rotor shaft at least partially disposed within the cavity: a second rotor rotationally coupled to the second rotor shaft and configured to rotate independently with respect to the first rotor.
Claim 24
Dependent Claim
66 words
A motor, comprising: a common stator having an inner surface defining a cavity; a first rotor shaft at least partially disposed within the cavity; a first rotor rotationally coupled to the first rotor shaft; a second rotor shaft at least partially disposed within the cavity: a second rotor rotationally coupled to the second rotor shaft and configured to rotate independently with respect to the first rotor.
Claim 25
Dependent Claim
104 words
An electric drive system, comprising: a motor comprising; a common stator having an inner surface defining a cavity; a first rotor shaft at least partially disposed within the cavity; a first rotor rotationally coupled to the first rotor shaft; a second rotor shaft at least partially disposed within the cavity; a second rotor rotationally coupled to the second rotor shaft and configured to rotate independently with respect to the first rotor; and first and second drive wheels coupled to the first and second drive shafts, respectively; and an electric power source coupled to the common stator to thereby drive the first and second rotors.
Claim 26
Dependent Claim
104 words
An electric drive system, comprising: a motor comprising; a common stator having an inner surface defining a cavity; a first rotor shaft at least partially disposed within the cavity; a first rotor rotationally coupled to the first rotor shaft; a second rotor shaft at least partially disposed within the cavity; a second rotor rotationally coupled to the second rotor shaft and configured to rotate independently with respect to the first rotor; and first and second drive wheels coupled to the first and second drive shafts, respectively; and an electric power source coupled to the common stator to thereby drive the first and second rotors.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2008-07-04 | 2009-01-03 | 2009-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-07-04 | 2013-01-03 | 2013-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-07-04 | 2017-01-03 | 2017-07-05 | $7700.00 | Window Closed / Lapsed |