Patent US3777239A successfully refreshed from Google Patents.
US3777239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator for dc power source
Assignee: Panasonic Holdings Corp
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Filing: 1972-08-16
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Granted: 1973-12-04
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Expires: 1992-08-16
Abstract
Abstract In a DC power source in which a silicon controlled rectifier is connected in series with a DC circuit of a single phase AC bridge rectifier so that the phase of the firing angle may be controlled to control the load voltage upon the armature of a D.C. motor, a saturable reactor is inserted in series with the AC power source of said bridge rectifier.
Inventors
- 👤 T Seri
- 👤 S Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:51
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A controlled D.C. power supply of the type using a source of A.C. voltage comprising a saturable reactor for coupling to one side of the A.C. source, full wave rectifying means for rectifying the A.C. voltage coupled to said saturable reactor, and to the other side of the A.C. source, an SCR having its anode coupled to the positive output terminal of said rectifying means, a D.C. load coupled to the cathode of said SCR and to the negative output terminal of said rectifying means and, an inductive reactance connected between said positive and negative output terminals of said bridge; said saturable reactor enabling said SCR to turn off at a predetermined voltage at said rectifying means output terminals.
Claim 2
Dependent Claim
119 words
A controlled D.C. power supply of the type using a source of A.C. voltage comprising a saturable reactor for coupling to one side of the A.C. source, full wave rectifying means for rectifying the A.C. voltage coupled to said saturable reactor, and to the other side of the A.C. source, an SCR having its anode coupled to the positive output terminal of said rectifying means, a D.C. load coupled to the cathode of said SCR and to the negative output terminal of said rectifying means and, an inductive reactance connected between said positive and negative output terminals of said bridge; said saturable reactor enabling said SCR to turn off at a predetermined voltage at said rectifying means output terminals.
Claim 3
Dependent Claim
62 words
A controlled D.C. supply as recited in claim 1 wherein said D.C. load comprises an armature winding of a D.C. shunt motor and a rectifier in parallel with said armature having the anode thereof coupled to the cathode of said SCR; said reactance being the field winding of said D.C. shunt motor and said rectifying means comprising a single phase A.C. bridge.
Claim 4
Dependent Claim
27 words
The controlled D.C. power supply of claim 2 wherein said saturable reactor is saturable with a saturation current smaller than the saturation current of said field winding.
Claim 5
Dependent Claim
38 words
The controlled D.C. supply of claim 2 wherein said saturable reactor is saturable by current from said source of A.C. voltage, the saturation time of said saturable reactor being longer than the turn off time of said SCR.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |