US3781644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Independently controlled inverter with universal commutating circuit
Assignee: Individual
•
Filing: 1973-03-23
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Granted: 1973-12-25
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Expires: 1993-03-23
Abstract
Abstract An independently controlled inverter with a universal commutating circuit, comprising main thyristors in a three- phase bridge connection whose input is coupled to a d.c. supply source, and whose a.c. side is coupled to commutating thyristors also in a three-phase bridge connection, the d.c. side whereof is connected to an additional charge source and to additional thyristors in a single-phase bridge connection, the diagonal of the latter including a commutating capacitor, is characterized, according to the invention, by that the anode group of the additional thyristor single-phase bridge connection is coupled to the cathode group of the commutating thyristor three-phase bridge connection and, via a choke and a diode, to the positive terminal of the additional charge source, while the cathode group of said additional thyristor single-phase bridge connection is coupled to the anode group of said commutating thyristor three-phase bridge connection and to the negative terminal of the additional charge source.
Inventors
- 👤 V Yatsuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:12
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/5155
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
An independently controlled inverter with a universal commutating circuit comprising main thyristors in a three-phase bridge connection, the input whereof is coupled to a d.c. supply source; commutating thyristors in a three-phase bridge connection whose a.c. side is coupled to said main thyristor three-phase bridge connection ; an additional charge source; additional thyristors in a single-phase bridge connection whose anode group is coupled to the cathode group of said commutating thyristor three-phase bridge connection and, via a choke and a diode, to the positive terminal of said additional charge source, and whose cathode group is coupled to the anode group of said commutating thyristor three-phase bridge connection and to the negative terminal of said additional charge source; a commutating capacitor in the diagonal of said additional thyristor singlephase bridge connection.
Claim 2
Dependent Claim
130 words
An independently controlled inverter with a universal commutating circuit comprising main thyristors in a three-phase bridge connection, the input whereof is coupled to a d.c. supply source; commutating thyristors in a three-phase bridge connection whose a.c. side is coupled to said main thyristor three-phase bridge connection ; an additional charge source; additional thyristors in a single-phase bridge connection whose anode group is coupled to the cathode group of said commutating thyristor three-phase bridge connection and, via a choke and a diode, to the positive terminal of said additional charge source, and whose cathode group is coupled to the anode group of said commutating thyristor three-phase bridge connection and to the negative terminal of said additional charge source; a commutating capacitor in the diagonal of said additional thyristor singlephase bridge connection.
Claim 3
Dependent Claim
85 words
An independently controlled inverter as claimed in Claim 1, also comprising reactive-current diodes intended to mutually compensate the reactive power between the phases of the inverter load, which diodes are in a three-phase bridge connection arranged between said d.c. supply source and the inverter load phases; commutating chokes connected between said reactive-current diode and main thyristor bridge connections; an additional commutating choke inserted between the anode group of said additional thyristor single-phase bridge connection and the cathode group of said commutating thyristor three-phase bridge connection.
Claim 4
Dependent Claim
71 words
An independently controlled inverter as claimed in claim 1, also comprising reactive-current diodes intended to mutually compensate the reactive power between the phases of the inverter load, which diodes are in a bridge connection arranged between said d.c. supply source and the inverter load phases; a commutating choke inserted between the anode group of said additional thyristor single-phase bridge connection and the cathode group of said commutating thyristor three-phase bridge connection.
Claim 5
Dependent Claim
70 words
An independently controlled inverter as claimed in claim 1, also comprising additional thyristors operating at a triple frequency, one additional thyristor being inserted between the anode group of said commutating thyristor three-phase bridge connection and the negative terminal of the inverter power source, and the other additional thyristor being inserted between the cathode group of said commutating thyristor three-phase bridge connection and the positive terminal of said inverter power source.
Claim 6
Dependent Claim
70 words
An independently controlled inverter as claimed in claim 2, also comprising additional thyristors operating at a triple frequency, one additional thyristor being inserted between the anode group of said commutating thyristor three-phase bridge connection and the negative terminal of the inverter power source, and the other additional thyristor being inserted between the cathode group of aid commutating thyristor three-phase bridge connection and the positive terminal of said inverter power source.
Claim 7
Dependent Claim
59 words
An independently controlled inverter as claimed in Claim 1, also comprising decoupling diodes intended to make said commutating thyristors perform the function of reactive-current diodes for which purpose the anode and cathode groups of said commutating thyristors are coupled to the negative and poSitive terminals respectively of said d.c. supply source and additional charge source, via said desoupling diodes.
Claim 8
Dependent Claim
38 words
An independently controlled inverter as claimed in claim 5, also comprising additional thryistors placed in parallel opposition with said decoupling diodes arranged between the anode and cathode groups of said commutating thyristors and the inverter power source terminals.
Claim 9
Dependent Claim
102 words
An independently controlled inverter as claimed in claim 1, also comprising an additional inverter ensuring the return of the reactive load power to the main circuit, which additional inverter is in a three-phase bridge connection whole anode group is coupled to the positive terminal of said additional charge source and, via said choke and diode, to the anode and cathode groups respectively of said additional thyristor single-phase bridge connection and commutating thyristor three-phase bridge connection, and whose cathode group is coupled to the cathode and anode groups of said thyristor bridge connections and to the negative terminal of said additional charge source.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |