US3824449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroresonant voltage regulating circuit
Assignee: Individual
•
Filing: 1973-05-29
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Granted: 1974-07-16
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Expires: 1993-05-29
Abstract
Abstract A ferroresonant voltage regulator circuit includes a saturable transformer, an unsaturable transformer in series with the input, and a capacitor across the saturable transformer. Voltage sensing and referencing circuitry is inserted in the output. A synchronous switch having a control wire - usually a saturable reactor, magnetic amplifier or triac - is connected across at least a portion of the saturable transformer, and is controlled by the control coil so that the saturable transformer has a load from the synchronous switch at no-load conditions of the regulator. The amount of loading on the saturable transformer from the synchronous switch varies substantially inversely as the amount of loading because of the regulator load.
Inventors
- 👤 A Hase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
221 words
A ferroresonant voltage regulating circuit having an AC input voltage and a regulated AC output voltage comprising: a constant voltage transformer having an input side and an output side, and having an iron core and an overwind coil; a first capacitor connected across said constant voltage transformer so as to be across the input side of said transformer, said overwind coil being on the side of the constant voltage transformer across which said capacitor is connected; a linear reactor having an air gap, and connected in series with said AC input voltage; said iron core transformer, capacitor and linear reactor comprising a tuned ferroresonant circuit; synchronous switch means connected across at least a portion of one winding of said constant voltage transformer; said synchronous switch having a control means which acts to make said synchronous switch conductive when said control means is conductive; voltage sensing means across the output of said voltage regulating circuit, rectifier means and reference circuit means connected therewith through driving circuit means to a threewire semiconductor device so as to render said three-wire semiconductor device conductive at no load conditions of said voltage regulating circuit; and auxiliary DC power supply means for said three-wire semiconductor device and said driving circuit means; wherein said control means of said synchronous switch is in series with said three-wire semiconductor device.
Claim 2
Dependent Claim
221 words
A ferroresonant voltage regulating circuit having an AC input voltage and a regulated AC output voltage comprising: a constant voltage transformer having an input side and an output side, and having an iron core and an overwind coil; a first capacitor connected across said constant voltage transformer so as to be across the input side of said transformer, said overwind coil being on the side of the constant voltage transformer across which said capacitor is connected; a linear reactor having an air gap, and connected in series with said AC input voltage; said iron core transformer, capacitor and linear reactor comprising a tuned ferroresonant circuit; synchronous switch means connected across at least a portion of one winding of said constant voltage transformer; said synchronous switch having a control means which acts to make said synchronous switch conductive when said control means is conductive; voltage sensing means across the output of said voltage regulating circuit, rectifier means and reference circuit means connected therewith through driving circuit means to a threewire semiconductor device so as to render said three-wire semiconductor device conductive at no load conditions of said voltage regulating circuit; and auxiliary DC power supply means for said three-wire semiconductor device and said driving circuit means; wherein said control means of said synchronous switch is in series with said three-wire semiconductor device.
Claim 3
Dependent Claim
17 words
The ferroresonant voltage regulating circuit of claim 1, wherein said synchronous switch means is a saturable reactor.
Claim 4
Dependent Claim
16 words
The ferroresonant voltage regulating circuit of claim 1, where said three-wire semiconductor device is a transistor.
Claim 5
Dependent Claim
18 words
The ferroresonant voltage regulating circuit of claim 1, where said three-wire semiconductor device is a silicon controlled rectifier.
Claim 6
Dependent Claim
16 words
The ferroresonant voltage regulating circuit of claim 1, where sAid constant voltage transformer is an autotransformer.
Claim 7
Dependent Claim
25 words
The ferroresonant voltage regulating circuit of claim 1, where said constant voltage transformer is an isolating transformer having a primary winding and a secondary winding.
Claim 8
Dependent Claim
31 words
The ferroresonant voltage regulating circuit of claim 1, including a choke in series with said rectifier means and said reference circuit means, and a second capacitor across said reference circuit means.
Claim 9
Dependent Claim
33 words
The ferroresonant voltage regulating circuit of claim 7 further including another capacitor across the input of said circuit, and a second linear reactor having an air gap across the output of said circuit.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |