US3732485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus having inverse parallel connected pairs of thyristors
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 such an order so as to assure commutation of any prior conducting thyristor.
Inventors
- 👤 C Kettler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:41
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24; G05F1/26; G05F1/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, 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 one end 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 the other end 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 aid pair of inverse parallel connected pairs of thyristors being connected to an electrical potential of smaller magnitude.
Claim 2
Dependent Claim
147 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, 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 one end 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 the other end 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 aid pair of inverse parallel connected pairs of thyristors being connected to an electrical potential of smaller magnitude.
Claim 3
Dependent Claim
183 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, 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, one end of said primary winding of said transformer being connected to the junction of said first and second pairs of inverse parallel connected thyristors and the other end of said primary winding being connected to the junction of said third and fourth pairs of inverse parallel connected thyristors; a fifth and sixth pair of inverse parallel connected thyristors connected in series between said input terminal and said common point; said primary winding of said transformer provided with a tap, said tap being connected to a junction of said fifth and sixth pair of inverse parallel connected thyristors conneCted in series between said input terminal and said common point.
Claim 4
Dependent Claim
183 words
An electrical apparatus, comprising: an input terminal; an output terminal; a transformer having a primary and a secondary winding, 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, one end of said primary winding of said transformer being connected to the junction of said first and second pairs of inverse parallel connected thyristors and the other end of said primary winding being connected to the junction of said third and fourth pairs of inverse parallel connected thyristors; a fifth and sixth pair of inverse parallel connected thyristors connected in series between said input terminal and said common point; said primary winding of said transformer provided with a tap, said tap being connected to a junction of said fifth and sixth pair of inverse parallel connected thyristors conneCted in series between said input terminal and said common point.
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 |