Patent US2471822A successfully refreshed from Google Patents.
US3633083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroresonant amplifying servomotors
Assignee: MINI IND CONST MASINI
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Filing: 1968-01-12
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Granted: 1972-01-04
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Expires: 1988-01-12
Abstract
Abstract A ferroresonant servomotor characterized by the fact that saturation coils are series connected with diodes and the resulting circuits are in parallel connection and are connected to an alternating current supply voltage, the diodes, which are connected in series with the saturation coils through which passes flux produced by primary coils of the same ferroresonant circuit, being connected in an inverse conduction sense, while control coils proper, through which passes direct current, are mounted on each pole in such a way that their ampere-turns are added in the closed magnetic circuit of the pole to the ampereturns of the saturation coils on the poles of one of the ferroresonant circuits and are subtracted from the ampere-turns of the saturation coils at the poles of the other ferroresonant circuit.
Inventors
- 👤 Dan Teodorescu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:31
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
237 words
A ferroresonant servomotor assembly comprising rotor and stator means, one of said rotor and stator means including a plurality of poles, arranged in pairs of poles of opposite polarity, primary coils, saturation and control windings connected at respective poles of said pairs of poles to form at least two ferroresonant circuits which generate flux, each of said two ferroresonant circuits including two of said primary coils from one pair of poles of opposite polarity, rectifier means connected in series with respective saturation windings, each of said rectifier means at one pole of a pair of poles being connected in opposing polarity with respect to the rectifier means connected to the saturation winding connected at the Other pole of said pair of poles of opposite polarity means for applying an AC voltage to said ferroresonant circuits and to said primary windings, and means applying a DC control current to said control winding, the control and saturation windings in one of said pair of poles having ampere-turns arranged in additive relation in the closed magnetic circuit of each of said poles situated in the interior of said primary windings, and in an other of said pair of poles in bucking relation, so that at a control current of an arbitrary sense, the current through said saturation windings is increased at the poles of one of the said ferroresonant circuits and reduced at the poles of the other ferroresonant circuit.
Claim 2
Dependent Claim
237 words
A ferroresonant servomotor assembly comprising rotor and stator means, one of said rotor and stator means including a plurality of poles, arranged in pairs of poles of opposite polarity, primary coils, saturation and control windings connected at respective poles of said pairs of poles to form at least two ferroresonant circuits which generate flux, each of said two ferroresonant circuits including two of said primary coils from one pair of poles of opposite polarity, rectifier means connected in series with respective saturation windings, each of said rectifier means at one pole of a pair of poles being connected in opposing polarity with respect to the rectifier means connected to the saturation winding connected at the Other pole of said pair of poles of opposite polarity means for applying an AC voltage to said ferroresonant circuits and to said primary windings, and means applying a DC control current to said control winding, the control and saturation windings in one of said pair of poles having ampere-turns arranged in additive relation in the closed magnetic circuit of each of said poles situated in the interior of said primary windings, and in an other of said pair of poles in bucking relation, so that at a control current of an arbitrary sense, the current through said saturation windings is increased at the poles of one of the said ferroresonant circuits and reduced at the poles of the other ferroresonant circuit.
Claim 3
Dependent Claim
17 words
An assembly as claimed in claim 1 including capacitors connected to respective ones of said primary windings.
Claim 4
Dependent Claim
13 words
An assembly as claimed in claim 1 wherein the rectifier means are diodes.
Claim 5
Dependent Claim
111 words
An assembly as claimed in claim 1, further comprising reaction windings mounted on said poles in the same closed magnetic circuits with the said control and saturation windings, said reaction windings being connected with the saturation and control windings in self-saturating magnetic relay circuits, each relay circuit including two poles with two saturation windings, two control windings, two reaction windings and four diodes, the said saturation windings causing the saturation of the corresponding poles of one of the said ferroresonant circuits, the saturation and control windings being in additive relation at the poles of one of the ferroresonant circuits and in bucking relation at the poles of the other ferroresonant circuits.
Claim 6
Dependent Claim
26 words
An assembly as claimed in claim 4 wherein said reaction windings are wound to have ampere-turns in additive relation with the ampere-turns of the saturation windings.
Claim 7
Dependent Claim
26 words
An assembly as claimed in claim 4 wherein said reaction windings are wound to have ampere-turns in bucking relation with the ampere-turns of the saturation windings.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |