US4388585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical power generating system
Assignee: National Aeronautics and Space Administration
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Filing: 1981-03-16
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Granted: 1983-06-14
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Expires: 2001-03-16
Abstract
Abstract A power generating system for adjustably coupling an induction motor, as a generator, to an A.C. power line wherein the motor and power line are connected through a triac. The triac is regulated to normally turn "on" at a relatively late point in each half cycle of its operation, whereby at less than operating speed, and thus when the induction motor functions as a motor rather than as a generator, power consumption from the line is substantially reduced.
Inventors
- 👤 Frank J. Nola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:09
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
An electrical generating system comprising: an induction motor/generator device having a power shaft and a pair of power terminals; rotary power means for coupling a rotating movement to said power shaft; an alternating current power supply line having a pair of power terminals; triac means, including at least one triac, having a control input and a pair of power terminals; said power terminals of said device and power line being interconnected through said power terminals of said triac, and control means connected between one of said power terminals and said control input of said triac for delaying the turn "on" point of said triac with respect to the period of each half cycle of alternating current power to normally limit the power transfer from said power line to said device; whereby a higher net transfer of power from said device to said power line may be obtained.
Claim 2
Dependent Claim
147 words
An electrical generating system comprising: an induction motor/generator device having a power shaft and a pair of power terminals; rotary power means for coupling a rotating movement to said power shaft; an alternating current power supply line having a pair of power terminals; triac means, including at least one triac, having a control input and a pair of power terminals; said power terminals of said device and power line being interconnected through said power terminals of said triac, and control means connected between one of said power terminals and said control input of said triac for delaying the turn "on" point of said triac with respect to the period of each half cycle of alternating current power to normally limit the power transfer from said power line to said device; whereby a higher net transfer of power from said device to said power line may be obtained.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |