US3571699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: National Aeronautics and Space Administration
•
Filing: 1969-10-13
•
Granted: 1971-03-23
•
Expires: 1989-10-13
Abstract
Abstract Voltage regulators designed for connection in series with an alternating current source and a load and employing a three-leg, two-window transformer are disclosed. Secondary windings on the two outer transformer core legs are interconnected to form a pair of secondary winding systems and the systems are interconnected via a variable resistance. Voltage regulation is achieved by varying the flux distribution in the transformer core by employing variable resistance to distribute the load current between the winding systems.
Inventors
- 👤 Sherwood Thaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:04
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/14; G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F1/16; G05F1/20; G05F1/46; G05F1/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A voltage regulation apparatus comprising: transformer core means, said transformer core means comprising a three-leg, two-window transformer core and including at least two parallel magnetic circuits; an input winding coupled to said core means and adapted to be connected across an unregulated source of alternating current, said input winding comprising a primary winding wound on a first leg of said core; a plurality of output windings, said output windings being coupled to preselected of said magnetic circuits whereby voltages may be inducted therein; flux distribution control means interconnecting certain of said output windings, said control means varying the flux distribution between said parallel magnetic circuits whereby the voltages induced in said output windings will vary; means for connecting said interconnected output windings across a load, said output windings comprising a first secondary winding wound on a second leg of said core; a second secondary winding wound on the third leg of said core; a third secondary winding wound on the third leg of said core; and a fourth secondary winding wound on the third leg of said core.
Claim 2
Dependent Claim
178 words
A voltage regulation apparatus comprising: transformer core means, said transformer core means comprising a three-leg, two-window transformer core and including at least two parallel magnetic circuits; an input winding coupled to said core means and adapted to be connected across an unregulated source of alternating current, said input winding comprising a primary winding wound on a first leg of said core; a plurality of output windings, said output windings being coupled to preselected of said magnetic circuits whereby voltages may be inducted therein; flux distribution control means interconnecting certain of said output windings, said control means varying the flux distribution between said parallel magnetic circuits whereby the voltages induced in said output windings will vary; means for connecting said interconnected output windings across a load, said output windings comprising a first secondary winding wound on a second leg of said core; a second secondary winding wound on the third leg of said core; a third secondary winding wound on the third leg of said core; and a fourth secondary winding wound on the third leg of said core.
Claim 3
Dependent Claim
37 words
The apparatus of claim 1 wherein said flux distribution control means comprises means connecting said first, third and fourth secondary windings in series; and variable resistance means connecting said series connected windings to said second secondary windings.
Claim 4
Dependent Claim
31 words
The apparatus of claim 2 wherein said variable resistance means comprises switch means connected between one end of said second secondary winding and one end of said series connected secondary windings.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |