Patent US4030020A successfully refreshed from Google Patents.
US4030020A
Expired / Lapsed
US
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Thyristor controlled direct current regulator
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1975-11-20
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Granted: 1977-06-14
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Expires: 1995-11-20
Abstract
Abstract A direct current regulator between a direct current power supply source and a load circuit includes a main thyristor and a quenching thyristor connected in parallel with the main thyristor through a series connection of a quenching condenser and inductive reactance. A change-over thyristor is connected into the circuit of the quenching thyristor, another thyristor is provided for recharging the condenser and a control unit is provided for gating the various thyristors to set their required ignition periods. The main thyristor connected in the lines leading from the voltage source to the load circuit is relieved of the charging as well as the change-over function by the use of additional thyristors, thus attaining a wider range of adjustment for the output voltage, and only one reactor component is required for the thyristor-controlled quenching and change-over circuits.
Inventors
- 👤 Fritz Korb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:05
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
212 words
In a direct current regulator for a load circuit supplied with current from a voltage source from two main lines, one of said main lines including a main thyristor, a quenching thyristor and a quenching condenser connected in a series circuit which latter is connected in parallel with said main thyristor, a change-over reactor connected to one electrode of said quenching condenser, a change-over thyristor, a connection from one main electrode of said change-over thyristor to the connection line between said quenching thyristor and said quenching condenser, a connection between the other main electrode of said change-over thyristor and the like main electrode of said main thyristor and a control unit connected to the gating electrodes of said thyristors for setting their ignition periods, the improvement wherein the said connection from said one main electrode of said change-over thyristor extends directly to the connection line between said quenching thyristor and said quenching condenser, wherein said change-over reactor is connected in series with said quenching condenser and wherein one main electrode of a charging thyristor is connected directly to a line connecting said quenching thyristor with the series circuit formed by said quenching condenser and said change-over reactor, the other main electrode of said charging thyristor being connected to said other main line.
Claim 2
Dependent Claim
212 words
In a direct current regulator for a load circuit supplied with current from a voltage source from two main lines, one of said main lines including a main thyristor, a quenching thyristor and a quenching condenser connected in a series circuit which latter is connected in parallel with said main thyristor, a change-over reactor connected to one electrode of said quenching condenser, a change-over thyristor, a connection from one main electrode of said change-over thyristor to the connection line between said quenching thyristor and said quenching condenser, a connection between the other main electrode of said change-over thyristor and the like main electrode of said main thyristor and a control unit connected to the gating electrodes of said thyristors for setting their ignition periods, the improvement wherein the said connection from said one main electrode of said change-over thyristor extends directly to the connection line between said quenching thyristor and said quenching condenser, wherein said change-over reactor is connected in series with said quenching condenser and wherein one main electrode of a charging thyristor is connected directly to a line connecting said quenching thyristor with the series circuit formed by said quenching condenser and said change-over reactor, the other main electrode of said charging thyristor being connected to said other main line.
Claim 3
Dependent Claim
58 words
A direct current regulator as defined in claim 1 wherein said change-over thyristor and said charging thyristor are connected in series in the forward direction and wherein the junction point between said change-over and charging thyristors is connected with the junction point of said quenching thyristor with the series circuit constituted by said change-over reactor and quenching condenser.
Claim 4
Dependent Claim
19 words
A direct current regulator as defined in claim 1 wherein said change-over reactor is of the iron core type.
Claim 5
Dependent Claim
204 words
In a direct current regulator for a load circuit supplied with current from a voltage source from two main lines, one of said main lines including a main thyristor, a quenching thyristor and a quenching condenser connected in a series circuit which latter is connected in parallel with said main thyristor, a change-over reactor connected to one electrode of said quenching condenser, a change-over thyristor, a connection from one main electrode of said change-over thyristor to the connection between said quenching thyristor and said quenching condenser, a connection between the other main electrode of said change-over thyristor and the like main electrode of said main thyristor and a control unit connected to the gating electrodes of said thyristors for setting their ignition periods, the improvement wherein the said connection from said one main electrode of said change-over thyristor extends directly to the connection line between said quenching thyristor and said quenching condenser, wherein said change-over reactor is connected in series with said quenching condenser and wherein one main electrode of a charging thyristor is connected directly to the junction between said series connected quenching condenser and said change-over reactor, the other main electrode of said charging thyristor being connected to said other main line.
Claim 6
Dependent Claim
204 words
In a direct current regulator for a load circuit supplied with current from a voltage source from two main lines, one of said main lines including a main thyristor, a quenching thyristor and a quenching condenser connected in a series circuit which latter is connected in parallel with said main thyristor, a change-over reactor connected to one electrode of said quenching condenser, a change-over thyristor, a connection from one main electrode of said change-over thyristor to the connection between said quenching thyristor and said quenching condenser, a connection between the other main electrode of said change-over thyristor and the like main electrode of said main thyristor and a control unit connected to the gating electrodes of said thyristors for setting their ignition periods, the improvement wherein the said connection from said one main electrode of said change-over thyristor extends directly to the connection line between said quenching thyristor and said quenching condenser, wherein said change-over reactor is connected in series with said quenching condenser and wherein one main electrode of a charging thyristor is connected directly to the junction between said series connected quenching condenser and said change-over reactor, the other main electrode of said charging thyristor being connected to said other main line.
Claim 7
Dependent Claim
30 words
A direct current regulator as defined in claim 4 wherein the connection between said other main electrode of said charging thyristor and said other main line includes an ohmic resistor.
Claim 8
Dependent Claim
19 words
A direct current regulator as defined in claim 4 wherein said change-over reactor is of the iron core type.
Claim 9
Dependent Claim
93 words
A direct current regulator as defined in claim 4 wherein said change-over thyristor is connected between that electrode of said quenching condenser which is connected to said one main line from said voltage source and a junction point between said change-over reactor and quenching thyristor and wherein one main electrode of said charging thyristor is connected exclusively to the junction point between said quenching condenser and change-over reactor, the other main electrode of said charging thyristor being connected with said other main line from said voltage source by way of an ohmic resistor.
References Cited (Backward Citations)
JPS4712451U
Cited
US3902110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |