US3858674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor-flywheel drive system
Assignee: Individual
•
Filing: 1972-10-16
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Granted: 1975-01-07
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Expires: 1992-10-16
Abstract
Abstract A variable speed electric drive system for load devices of high enertia comprises an electric motor drive, a flywheel continuously coupled to the electric motor drive, and a bidirectional variable torque converter coupled between the flywheel and the load device for varying the ratio of the output speed and torque to the load device with respect to the input speed and torque from the flywheel, the electric motor drive being of variable speed and having a self-regulation which is substantially matched to the speed regulation of the flywheel.
Inventors
- 👤 Harry Zvi Tabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:54
CPC Classifications
F; F16; F16H; F16H33/00; F16H33/02; B; B60; B60K; B60K1/00; B60K6/00; B60K6/08; B60K6/10; B60K6/105; B60L; B60L50/00; B60L50/30; B60L2260/00; B60L2260/10; B60L2260/16; B60L2260/167; F16H2706/00; Y; Y02; Y02E; Y02E60/00; Y02E60/16; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
203 words
A variable-speed electric drive system for load devices of high inertia, comprising: an electric motor drive including a stator, a rotor, and an output shaft directly coupled to said rotor through a fixed-ratio transmission; a flywheel directly coupled to said output shaft; a bi-directional variable torque converter coupling said flywheel to the load device for varying the ratio of the output speed and torque to the load device with respect to the input speed and torque from the flywheel, the electric motor drive being of variable-speed and having a selfregulation which is substantially matched to the speed regulation of the flywheel, the rated no-load speed of said motor drive being substantially equal to the maximum design speed of the flywheel, and the rated full-load speed of the motor drive being less than about 70 percent of the rated no-load speed of the motor drive; and means for continuously varying said ratio of the torque converter for controlling the acceleration of the drive system, the acceleration of the drive system thereby depending only on the ratio of the torque converter and not on the power produced by the electric motor drive, whereby a wide variation of speed is permitted without overloading the electric motor.
Claim 2
Dependent Claim
203 words
A variable-speed electric drive system for load devices of high inertia, comprising: an electric motor drive including a stator, a rotor, and an output shaft directly coupled to said rotor through a fixed-ratio transmission; a flywheel directly coupled to said output shaft; a bi-directional variable torque converter coupling said flywheel to the load device for varying the ratio of the output speed and torque to the load device with respect to the input speed and torque from the flywheel, the electric motor drive being of variable-speed and having a selfregulation which is substantially matched to the speed regulation of the flywheel, the rated no-load speed of said motor drive being substantially equal to the maximum design speed of the flywheel, and the rated full-load speed of the motor drive being less than about 70 percent of the rated no-load speed of the motor drive; and means for continuously varying said ratio of the torque converter for controlling the acceleration of the drive system, the acceleration of the drive system thereby depending only on the ratio of the torque converter and not on the power produced by the electric motor drive, whereby a wide variation of speed is permitted without overloading the electric motor.
Claim 3
Dependent Claim
30 words
A drive system according to claim 1, wherein the rated full-load speed of the motor drive is 40 - 70 percent of the rated no-load speed of the motor drive.
Claim 4
Dependent Claim
29 words
A drive system according to claim 1, wherein the rated full-load speed of the motor drive is about 50 percent of the rated no-load speed of the motor drive.
Claim 5
Dependent Claim
145 words
A variable-speed electric drive system for load devices of high inertia, comprising, an electric motor drive, a flywheel continuously coupled to said electric motor drive, and a bi-directional variable torque converter coupled between said flywheel and the load device for varying the ratio of the output speed and torque to the load device with respect ot the input speed and torque from the flywheel, the electric motor drive being of variable-speed and having a self-regulation which is substantially matched to the speed regulation of the flywheel; and means for continuously varying said ratio of the torque converter for controlling the acceleration of the drive system, the acceleration of the drive system thereby depending only on the ratio of the torque converter and not on the power produced by the electric motor drive, whereby a wide variation of speed is permitted without overloading the electric motor.
Claim 6
Dependent Claim
145 words
A variable-speed electric drive system for load devices of high inertia, comprising, an electric motor drive, a flywheel continuously coupled to said electric motor drive, and a bi-directional variable torque converter coupled between said flywheel and the load device for varying the ratio of the output speed and torque to the load device with respect ot the input speed and torque from the flywheel, the electric motor drive being of variable-speed and having a self-regulation which is substantially matched to the speed regulation of the flywheel; and means for continuously varying said ratio of the torque converter for controlling the acceleration of the drive system, the acceleration of the drive system thereby depending only on the ratio of the torque converter and not on the power produced by the electric motor drive, whereby a wide variation of speed is permitted without overloading the electric motor.
Claim 7
Dependent Claim
19 words
A system according to claim 1, further including a clutch for disconnecting the drive system from the load device.
Claim 8
Dependent Claim
16 words
A drive system according to claim 1, wherein said electric motor is a DC compound-field motor.
Claim 9
Dependent Claim
44 words
A drive system according to claim 1, wherein said electric motor is a DC motor having a field winding, and control means therefore providing a component of field current which is substantially constant, and a component of field current which varies with armature current.
Claim 10
Dependent Claim
30 words
A drive system according to claim 1, wherein said bi-directional variable torque converter provides a variation in speed ratio of at least 10 times between the lowest and highest ratios.
Claim 11
Dependent Claim
17 words
A drive system according to claim 1, further including a battery supplying power to the electric motor.
Claim 12
Dependent Claim
16 words
A vehicle including a traction wheel and a drive system therefore as defined in claim 9.
Claim 13
Dependent Claim
23 words
A vehicle according to claim 10, wherein the mass of the flywheel is about 5-10 percent of the total mass of the vehicle.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |