Patent US3679966A successfully refreshed from Google Patents.
US3679966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed loop parametric voltage regulator
Assignee: Ambac Industries Inc
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Filing: 1968-07-31
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Granted: 1972-07-25
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Expires: 1988-07-31
Abstract
Abstract A parametric voltage regulator in which the inductance component of the resonant circuit of a parametric device is varied in response to changes in the output voltage, caused for example by changes in line frequency, to maintain the output voltage constant. The inductance is preferably changed by providing an external flux generator on the core of the parametric device to vary the reluctance of a part of the core, but can also be accomplished by the use of a separate inductor in the resonant circuit.
Inventors
- 👤 Cravens L Wanlass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:53
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
207 words
A voltage regulator comprising: an input circuit adapted to be connected to a source of A.C. voltage; a variable inductor comprising a first magnetic core having four common regions and two end regions magnetically joining said common regions, a load winding wound on said core and encompassing a magnetic circuit therein, the effective reluctance of said magnetic circuit controlling the inductance of said load winding, and a control winding wound on said core, said control winding being responsive to current therein for controlling the effective reluctance of said magnetic circuit whereby variations in said current vary the inductance of said load winding at twice the frequency of said current; a second magnetic core mounted on said first core and having a winding thereon, a current in said winding affecting the reluctance of said magnetic circuit and hence the inductance of said load winding; means coupling said control winding to said input circuit; a capacitor connected to said load winding to form a resonant circuit therewith; an output circuit coupled to said resonant circuit; a sensing circuit coupled to said output circuit for producing a control voltage representative of the voltage in said output circuit; and means coupling said control voltage to said winding on said second core.
Claim 2
Dependent Claim
207 words
A voltage regulator comprising: an input circuit adapted to be connected to a source of A.C. voltage; a variable inductor comprising a first magnetic core having four common regions and two end regions magnetically joining said common regions, a load winding wound on said core and encompassing a magnetic circuit therein, the effective reluctance of said magnetic circuit controlling the inductance of said load winding, and a control winding wound on said core, said control winding being responsive to current therein for controlling the effective reluctance of said magnetic circuit whereby variations in said current vary the inductance of said load winding at twice the frequency of said current; a second magnetic core mounted on said first core and having a winding thereon, a current in said winding affecting the reluctance of said magnetic circuit and hence the inductance of said load winding; means coupling said control winding to said input circuit; a capacitor connected to said load winding to form a resonant circuit therewith; an output circuit coupled to said resonant circuit; a sensing circuit coupled to said output circuit for producing a control voltage representative of the voltage in said output circuit; and means coupling said control voltage to said winding on said second core.
Claim 3
Dependent Claim
19 words
The regulator of claim 1, wherein said second core is a C-core mounted on one of said end regions.
Claim 4
Dependent Claim
21 words
The regulator of claim 2, wherein said first core comprises a pair of C-cores rotated 90* and joined at their bases.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |