US3732486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus with thyristor circuit
Assignee: General Electric Co
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Filing: 1971-12-29
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Granted: 1973-05-08
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Expires: 1991-12-29
Abstract
Abstract Voltage regulator apparatus for an alternating current electrical system which includes a secondary of a transformer connected in series with the line. A voltage of either polarity or no voltage is applied to the primary of the transformer through a plurality of pairs of inverse parallel connected thyristors. The thyristors are gated in an order to assure commutation of any prior conducting thyristor.
Inventors
- 👤 C Schoendube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:15
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24; G05F1/26; G05F1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, said primary winding having a first and a second input terminal, said secondary winding being connected between said input and output terminals; a first and a second pair of inverse parallel connected thyristors connected in series between said input terminal and a common point; a third and a fourth pair of inverse parallel connected thyristors connected in series between said input terminal and said common point, said first terminal of said primary winding of said transformer being connected to the junction of said first and second pairs of inverse parallel connected thyristors and said second terminal of said primary winding being connected to the junction of said third and fourth pairs of inverse parallel connected thyristors; a fifth pair of inverse parallel connected thyristors connected between said first and second terminals of said primary winding of said transformer.
Claim 2
Dependent Claim
157 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, said primary winding having a first and a second input terminal, said secondary winding being connected between said input and output terminals; a first and a second pair of inverse parallel connected thyristors connected in series between said input terminal and a common point; a third and a fourth pair of inverse parallel connected thyristors connected in series between said input terminal and said common point, said first terminal of said primary winding of said transformer being connected to the junction of said first and second pairs of inverse parallel connected thyristors and said second terminal of said primary winding being connected to the junction of said third and fourth pairs of inverse parallel connected thyristors; a fifth pair of inverse parallel connected thyristors connected between said first and second terminals of said primary winding of said transformer.
Claim 3
Dependent Claim
180 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, said primary winding having a first and a second terminal, said secondary winding being connected between said input and output terminals; a plurality of inverse parallel connected pairs of thyristors, each of said inverse parallel connected pairs of thyristors being connected between said first terminal of said primary winding of said transformer and one of a plurality of electrical potentials of different magnitudes in an alternating potential system; a pair of inverse parallel connected pairs of thyristors connected to said second terminal of said primary winding of said transformer, the other end of one of said pairs of inverse parallel connected pairs of thyristors being connected to an electrical potential of larger magnitude and the other end of the other of said pair of inverse parallel connected pairs of thyristors being connected to an electrical potential of smaller magnitude; a single inverse parallel connected pair of thyristors connected between said first and second terminals of said primary winding of said transformer.
Claim 4
Dependent Claim
180 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, said primary winding having a first and a second terminal, said secondary winding being connected between said input and output terminals; a plurality of inverse parallel connected pairs of thyristors, each of said inverse parallel connected pairs of thyristors being connected between said first terminal of said primary winding of said transformer and one of a plurality of electrical potentials of different magnitudes in an alternating potential system; a pair of inverse parallel connected pairs of thyristors connected to said second terminal of said primary winding of said transformer, the other end of one of said pairs of inverse parallel connected pairs of thyristors being connected to an electrical potential of larger magnitude and the other end of the other of said pair of inverse parallel connected pairs of thyristors being connected to an electrical potential of smaller magnitude; a single inverse parallel connected pair of thyristors connected between said first and second terminals of said primary winding of said transformer.
Claim 5
Dependent Claim
28 words
An electrical apparatus as recited in claim 2 wherein said plurality of electrical potentials of different magnitudes is provided by a shunt transformer having a plurality of taps.
Claim 6
Dependent Claim
28 words
An electrical apparatus as recited in claim 2 wherein said plurality of electrical potentials of different magnitudes is provided by a step-down transformer having a plurality of taps.
Claim 7
Dependent Claim
68 words
An electrical apparatus as recited in claim 2 wherein said plurality of electrical potentials of different magnitudes is provided by a step-down transformer having a primary and a secondary winding, said primary winding being connected to said input terminal and said secondary winding being provided with a plurality of taps, each of said taps being connected to a different one of said inverse parallel connected pairs of thyristors.
Claim 8
Dependent Claim
66 words
An electrical apparatus as recited in claim 2 wherein said plurality of electrical potentials of different magnitudes is provided by a step-up transformer having a primary and a secondary winding, said primary winding being connected to said input terminal and said secondary winding having a plurality of taps, each of said taps being connected to a different one of said inverse parallel connected pairs of thyristors.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |