US3825812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier bridge silicon controlled rectifier trigger circuit
Assignee: Motors Liquidation Co
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Filing: 1973-04-11
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Granted: 1974-07-23
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Expires: 1993-04-11
Abstract
Abstract Corresponding to each silicon controlled rectifier of a threephase bridge rectifier circuit is a center tapped and an untapped secondary winding pair of a three-phase transformer, a pilot silicon controlled rectifier, a capacitor and an output winding of a magnetic amplifier. Each center tapped secondary winding supplies gate-cathode current to the pilot silicon controlled rectifier which corresponds to the same bridge circuit silicon controlled rectifier through the corresponding output winding of the magnetic amplifier. Each untapped secondary winding supplies gate-cathode current to the corresponding bridge circuit silicon controlled rectifier through the anode-cathode electrodes of the corresponding pilot silicon controlled rectifier and charging current to the corresponding capacitor. Each capacitor is also connected across another one of the untapped secondary windings which places a charge thereon prior to the time the corresponding pilot silicon controlled rectifier is triggered conductive through the anode-cathode electrodes.
Inventors
- 👤 Buhr A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:56
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a first potential source and a second potential source corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifIer having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said first potential source corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the corresponding said pilot silicon controlled rectifier in series across the corresponding said second potential source; means for connecting each of said capacitors across the said second potential source corresponding to the same said bridge circuit silicon controlled rectifier; and means for connecting each of said capacitors across another one of said second potential sources.
Claim 2
Dependent Claim
226 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a first potential source and a second potential source corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifIer having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said first potential source corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the corresponding said pilot silicon controlled rectifier in series across the corresponding said second potential source; means for connecting each of said capacitors across the said second potential source corresponding to the same said bridge circuit silicon controlled rectifier; and means for connecting each of said capacitors across another one of said second potential sources.
Claim 3
Dependent Claim
237 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a three-phase transformer having a three-phase primary winding and a pair of secondary windings corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifier having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said first secondary winding of the pair of secondary windings corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the corresponding said pilot silicon controlled rectifier in series across the corresponding said second secondary winding; means for connecting each of said capacitors across the said second secondary winding corresponding to the same said bridge circuit silicon controlled rectifier; and means for connecting each of said capacitors across another one of said second secondary windings.
Claim 4
Dependent Claim
237 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a three-phase transformer having a three-phase primary winding and a pair of secondary windings corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifier having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said first secondary winding of the pair of secondary windings corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the corresponding said pilot silicon controlled rectifier in series across the corresponding said second secondary winding; means for connecting each of said capacitors across the said second secondary winding corresponding to the same said bridge circuit silicon controlled rectifier; and means for connecting each of said capacitors across another one of said second secondary windings.
Claim 5
Dependent Claim
281 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a three-phase transformer having a three-phase primary winding and a center tapped and an untapped secondary winding corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifier having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said center tap and one terminal end of the said center tapped secondary winding corresponding to the same bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the Corresponding said pilot silicon controlled rectifier in series across the corresponding said untapped secondary winding; means for connecting each of said capacitors across the said untapped secondary winding corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting each of said capacitors across another one of said untapped secondary windings; and means for connecting the terminal ends of each of said center tapped secondary windings across the terminal ends of the said output winding of the said magnetic amplifier corresponding to the same said bridge circuit silicon controlled rectifier.
Claim 6
Dependent Claim
281 words
A rectifier bridge silicon controlled rectifier trigger circuit comprising in combination with a three-phase bridge-type full-wave rectifier circuit having at least three silicon controlled rectifiers, each having anode, cathode and gate electrodes: a three-phase transformer having a three-phase primary winding and a center tapped and an untapped secondary winding corresponding to each of said bridge circuit silicon controlled rectifiers; a pilot silicon controlled rectifier having anode, cathode and gate electrodes corresponding to each of said bridge circuit silicon controlled rectifiers; a capacitor corresponding to each of said bridge circuit silicon controlled rectifiers; a magnetic amplifier having a magnetic core and an output winding corresponding to each of said bridge circuit silicon controlled rectifiers; means for connecting each of said output windings and said gate-cathode electrodes of the said pilot silicon controlled rectifier corresponding to the same said bridge circuit silicon controlled rectifier in series across said center tap and one terminal end of the said center tapped secondary winding corresponding to the same bridge circuit silicon controlled rectifier; means for connecting said gate-cathode electrodes of each of said bridge circuit silicon controlled rectifiers and said anode-cathode electrodes of the Corresponding said pilot silicon controlled rectifier in series across the corresponding said untapped secondary winding; means for connecting each of said capacitors across the said untapped secondary winding corresponding to the same said bridge circuit silicon controlled rectifier; means for connecting each of said capacitors across another one of said untapped secondary windings; and means for connecting the terminal ends of each of said center tapped secondary windings across the terminal ends of the said output winding of the said magnetic amplifier corresponding to the same said bridge circuit silicon controlled rectifier.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |