US3962624A
Expired / Lapsed
US
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Thyristor rectifier
Assignee: ABB Norden Holding AB
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Filing: 1974-11-21
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Granted: 1976-06-08
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Expires: 1994-11-21
Abstract
Abstract A thyristor rectifier for a static converter is formed of a plurality of thyristors, each provided with a control device and a control circuit for the entire rectifier connected to these control devices. Detectors are provided and arrangements are provided response to the voltage over a thyristor to emit an indicating pulse to the detectors when the voltage over the thyristors amounts to a certain value. A selector is provided for sensing these pulses and for recording the indicating pulses emitted through the detectors to a counter. Control units are also provided which control and synchronize the control and counter in relation to each other.
Inventors
- 👤 Bernt Ostlund
- 👤 Georg Lindblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1203; H02H7/1206; H02M; H02M1/00; H02M1/08; H02M1/088; H02M1/096
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A thyristor rectifier for a static converter comprising a plurality of thyristors (13-1n) each provided with a control device (1), a control circuit (22) for the entire rectifier operatively connected with said control devices, detectors (2) and means (12) responsive to the voltage over each thyristor to emit an indicating pulse to said detectors when the voltage over a thyristor amounts to a certain value, a sensing member comprising a selector (4) for recording the indicating pulses emitted through the detectors, one after the other at a certain frequency, a counter (7,20), means to transmit the pulses from the selector to the counter, and control units (5,9) to control and synchronize the selector and the counter in relation to each other.
Claim 2
Dependent Claim
121 words
A thyristor rectifier for a static converter comprising a plurality of thyristors (13-1n) each provided with a control device (1), a control circuit (22) for the entire rectifier operatively connected with said control devices, detectors (2) and means (12) responsive to the voltage over each thyristor to emit an indicating pulse to said detectors when the voltage over a thyristor amounts to a certain value, a sensing member comprising a selector (4) for recording the indicating pulses emitted through the detectors, one after the other at a certain frequency, a counter (7,20), means to transmit the pulses from the selector to the counter, and control units (5,9) to control and synchronize the selector and the counter in relation to each other.
Claim 3
Dependent Claim
33 words
A thyristor rectifier according to claim 1, comprising memory circuits (3) connected between said detectors (2) and said selector (4) to record said indicating pulses before they are sensed by the selector (4).
Claim 4
Dependent Claim
50 words
A thyristor rectifier according to claim 1, including a recording memory device (8,21), said counter (7,20) being connected in parallel with said recording memory device, said recording memory device being controlled by the same control unit (9) as the counter, to record the indicating pulses from the different detectors (2).
Claim 5
Dependent Claim
45 words
A thyristor rectifier according to claim 1, in which said detectors (2) include output means to emit output pulses with a prolonged duration in relation to said indicating pulses, the length of said output pulses corresponding to the required sensing time of the selector (4).
Claim 6
Dependent Claim
42 words
A thyristor rectifier according to claim 1, in which the control unit (5) includes means to control the step frequency of the selector so that one thyristor in the thyristor rectifier is sensed after each conducting interval of the whole thyristor rectifier.
References Cited (Backward Citations)
US3794908A
Cited
US3842337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |