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US3609426A
Expired / Lapsed
US
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Inertia-driven standby electric generator unit
Assignee: Individual
•
Filing: 1969-04-30
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Granted: 1971-09-28
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Expires: 1989-04-30
Abstract
Abstract A flywheel rotated above the mound speed of a generator is selectively coupled to the generator through a variable-speed clutch upon power failure to keep the generator speed constant during the time it takes to substitute a standby power source.
Inventors
- 👤 Richard Gaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:01
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/066; H02K; H02K7/00; H02K7/02; H02K7/025; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02E; Y02E60/00; Y02E60/16; Y04; Y04S; Y04S20/00; Y04S20/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
159 words
An inertia-driven standby electric generator set including a rotary electric generator, a flywheel, a continuously variablespeed coupling clutch fitted between the generator shaft and the said flywheel, means for controlling the said variable-speed ratio acting in response to a drop in one of the instantaneous, characteristic values of the generator, and actuating means for rotating the said flywheel, and wherein the rotary electric generator is an alternator having a second flywheel mass directly keyed on the alternator shaft the means of control of the aforesaid speed-transmission ratio acting in response to the frequency of the current supplied by the said alternator to maintain the said frequency substantially constant and driving means for rotating and maintaining in rotation the said second flywheel substantially at the rated speed of the alternator; the means for driving the said flywheel masses being designed and arranged so that the speed of rotation of the first flywheel is higher than that of the second flywheel.
Claim 2
Dependent Claim
159 words
An inertia-driven standby electric generator set including a rotary electric generator, a flywheel, a continuously variablespeed coupling clutch fitted between the generator shaft and the said flywheel, means for controlling the said variable-speed ratio acting in response to a drop in one of the instantaneous, characteristic values of the generator, and actuating means for rotating the said flywheel, and wherein the rotary electric generator is an alternator having a second flywheel mass directly keyed on the alternator shaft the means of control of the aforesaid speed-transmission ratio acting in response to the frequency of the current supplied by the said alternator to maintain the said frequency substantially constant and driving means for rotating and maintaining in rotation the said second flywheel substantially at the rated speed of the alternator; the means for driving the said flywheel masses being designed and arranged so that the speed of rotation of the first flywheel is higher than that of the second flywheel.
Claim 3
Dependent Claim
63 words
A generator set as claimed in claim 1, in which the driving means of the second flywheel consist of an asynchronous motor coupled with the said flywheel through a variable-speed gear, the first flywheel being fixed on the shaft of a second asynchronous motor the said shaft whereof is connected with the shaft of the first asynchronous motor by a second, variable-speed gear.
Claim 4
Dependent Claim
37 words
A generator set as claimed in claim 1, in which the shaft of the alternator on which the second flywheel mass is keyed is directly coupled with the shaft of the asynchronous motor driving the said flywheel.
Claim 5
Dependent Claim
141 words
An inertia-driven standby electric generator apparatus for supplying current to a user network upon failure of current supplied by a main supply source, said apparatus comprising a generator means having a rated speed connectable with the user network, a flywheel, an electric motor means connectable with the main supply source to rotate the flywheel at a speed higher than the rated speed of said generator means, variable-speed transmission means connected to transmit driving torque from the flywheel to the generator means, and control means for said transmission means operable in response to changes in the electrical characteristics of the main supply source, producing corresponding changes in the speed ratio between said flywheel and said generator means such that the rated speed of said generator means is maintained substantially constant as long as the flywheel speed is above the rated generator speed.
Claim 6
Dependent Claim
141 words
An inertia-driven standby electric generator apparatus for supplying current to a user network upon failure of current supplied by a main supply source, said apparatus comprising a generator means having a rated speed connectable with the user network, a flywheel, an electric motor means connectable with the main supply source to rotate the flywheel at a speed higher than the rated speed of said generator means, variable-speed transmission means connected to transmit driving torque from the flywheel to the generator means, and control means for said transmission means operable in response to changes in the electrical characteristics of the main supply source, producing corresponding changes in the speed ratio between said flywheel and said generator means such that the rated speed of said generator means is maintained substantially constant as long as the flywheel speed is above the rated generator speed.
Claim 7
Dependent Claim
19 words
A generator apparatus according to claim 4, in which a second flywheel is directly coupled to said generator means.
Claim 8
Dependent Claim
28 words
A generator apparatus according to claim 4, in which an auxiliary motor is connected to drive said flywheel independently of the current supplied by the main power source.
Claim 9
Dependent Claim
33 words
A generator apparatus as claimed in claim 4, in which said generator means is connected in parallel with the main supply source, whereby said generator means functions as a motor under normal conditions.
Claim 10
Dependent Claim
38 words
A generator apparatus according to claim 4, in which said generator means is connected to be driven by a second electric motor interposed between said variable-speed transmission means and a coupling means also controllable by said control means.
Claim 11
Dependent Claim
27 words
A generator apparatus according to claim 8, in which said second electric motor drives said generator means at the rated generator speed through said variable-speed transmission means.
Claim 12
Dependent Claim
45 words
A generator apparatus according to claim 5, wherein said generator means and said second flywheel are connected to be driven by a second electric motor interposed between said variable-speed transmission means and said second flywheel, said second motor being connectable to said main supply source.
Claim 13
Dependent Claim
29 words
A generator apparatus according to claim 10, in which said generator means has a shaft which carries said second flywheel and is directly coupled with said second electric motor.
Claim 14
Dependent Claim
25 words
A generator apparatus according to claim 4, in which said generator means is connected in series between the main supply source and the user network.
Claim 15
Dependent Claim
31 words
A generator apparatus according to claim 4, in which said variable-speed transmission means comprises a magnetic clutch-receiving energizing current from a controller operating in response to changes in the generator speed.
Claim 16
Dependent Claim
127 words
An inertia-driven standby electric generator apparatus for supplying temporary electric power to a user circuit during periods of failure of a main power supply coupled to the user circuit, said apparatus comprising: standby electric generator means for connection to the user circuit; inertia-mass means for storing energy; drive means for imparting energy to said inertia-mass means during operative periods of the main power supply; and energy transfer means coupled between said inertia-mass means and said standby electric generator means, said energy transfer means being operative during periods of failure of the main power supply to transfer energy from said inertia-mass means to said standby electric generator means, and means to control the energy transfer means so as to maintain constant generator output throughout a given time duration.
Claim 17
Dependent Claim
127 words
An inertia-driven standby electric generator apparatus for supplying temporary electric power to a user circuit during periods of failure of a main power supply coupled to the user circuit, said apparatus comprising: standby electric generator means for connection to the user circuit; inertia-mass means for storing energy; drive means for imparting energy to said inertia-mass means during operative periods of the main power supply; and energy transfer means coupled between said inertia-mass means and said standby electric generator means, said energy transfer means being operative during periods of failure of the main power supply to transfer energy from said inertia-mass means to said standby electric generator means, and means to control the energy transfer means so as to maintain constant generator output throughout a given time duration.
Claim 18
Dependent Claim
105 words
An apparatus as defined in claim 14, wherein said standby electric generator means is adapted to run at a rated speed, said inertia-mass means comprising a rotatable flywheel driven by said drive means at a speed higher than said rated speed, and wherein said energy transfer means comprises a variable-ratio transmission device for transmitting driving torque from said flywheel to said standby electric generator means, and said control means being operable in response to changes in said generator output to produce corresponding changes in the transmission ratio such that said standby electric generator means runs at substantially its rated speed throughout said given time duration.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |