US3794908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor rectifier for high voltage
Assignee: ABB Norden Holding AB
•
Filing: 1973-01-29
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Granted: 1974-02-26
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Expires: 1993-01-29
Abstract
Abstract A thyristor rectifier for high voltage is formed of a plurality of thyristors connected in series and each having a control circuit controlled from a common control device. Connected to each control circuit is a light emitter of semiconductor type which emits a signal for the corresponding thyristors as long as the control circuit is intact and is being properly fed and the thyristor voltage has the proper polarity.
Inventors
- 👤 G Lindblom
- 👤 K Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:34
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/088; H02M1/096
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
Thysistor rectifier for high voltage comprising a number of thyristors (1) connected in series, each one provided with a control circuit (2) controlled from a common control device (4), in which a light emitter (28) of semiconductor type is connected to each control circuit, said light emitter emitting a signal for the corresponding thyristor in dependence on the ignition of the thyristor and the voltages of the control circuit.
Claim 2
Dependent Claim
69 words
Thysistor rectifier for high voltage comprising a number of thyristors (1) connected in series, each one provided with a control circuit (2) controlled from a common control device (4), in which a light emitter (28) of semiconductor type is connected to each control circuit, said light emitter emitting a signal for the corresponding thyristor in dependence on the ignition of the thyristor and the voltages of the control circuit.
Claim 3
Dependent Claim
27 words
Thyristor rectifier according to claim 1, in which said signal from said light emitter (28) is emitted in dependence of the voltage over the thyristor (1) concerned.
Claim 4
Dependent Claim
32 words
Thyristor rectifier according to claim 2, characterised in that said light emitter (28) is fed from an energy storing means (31) charged from the control circuit (3) of the thyristor (1) concerned.
Claim 5
Dependent Claim
48 words
Thyristor rectifier according to claim 3, characterised in that said light emitter (28) is ignited from a control member (30, 34) controlled by the voltage over the anode-cathode of the proper thyristor (1) in such a way that said light emitter is ignited when said voltage becomes positive.
Claim 6
Dependent Claim
29 words
Thyristor rectifier according to claim 2, characterised in that said light emitter (28) is ignited by the control device (2) of the thyristor (1) concerned together with the thyristor.
Claim 7
Dependent Claim
26 words
Thyristor rectifier according to claim 5, in which said thyristor control device (2) is blocked when the voltage over the thyristor is zero or below zero.
References Cited (Backward Citations)
US3462619A
Cited
US3593038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |