Patent US3359481A successfully refreshed from Google Patents.
US3359481A
Expired / Lapsed
US
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Means for deriving a control function voltage for converters
Assignee: ABB Norden Holding AB
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Filing: 1964-07-23
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Granted: 1967-12-19
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Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Bjork Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:09
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/15; H02M7/151; H02M1/00; H02M1/08; H02M1/081; H02M7/155; H02M7/1555; H02M7/1557
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A STATIC CURRENT CONVERTER COMPRISING A PLURALITY OF RECTIFIERS ARRANGED IN AT LEAST TWO COMMUTATING GROUPS, MEANS FOR DERIVING A CONTROL FUNCTION VOLTAGE FOR EACH OF THE RECTIFIERS OF SAID CONVERTERS, SAID MEANS COMPRISING FOR EACH RECTIFIER FIRST, SECOND AND THIRD A.C. VOLTAGE SOURCES, MEANS TO FEED SAID A.C. VOLTAGE SOURCES FROM THE COMMUTATION VOLTAGE FOR SUCH RECTIFIER, THAT IS, THE DIFFERENCE BETWEEN THE ANODE VOLTAGES OF A PARTICULAR RECTIFIER AND THE PRECEDING RECTIFIER OF THE SAME COMMUTATION GROUP; SAID FEEDING MEANS COMPRISING TRANSFORMERS AND PHASE SHIFTING MEANS, SAID COMMUTATION VOLTAGE BEING SUBSTANTIALLY A SINUSOIDAL VOLTAGE, SAID FEEDING MEANS FOR THE FIRST AND SECOND OF SAID A.C. VOLTAGE SOURCES INCLUDING MEANS TO TRANSFORM SAID COMMUTATION VOLTAGE INTO COSINUSOIDAL VOLTAGES HAVING THE SAME PHASE DISPLACEMENT AND AMPLITUDE BUT DIFFERENT BASE POTENTIALS, THE THIRD A.C. VOLTAGE HAVING SUCH AMPLITUDE, PHASE DISPLACEMENT AND BASE POTENTIAL AS TO FORM A TRANSITION VOLTAGE BETWEEN SAID FIRST AND SECOND COSINUSOIDAL VOLTAGES
Claim 2
Dependent Claim
156 words
IN A STATIC CURRENT CONVERTER COMPRISING A PLURALITY OF RECTIFIERS ARRANGED IN AT LEAST TWO COMMUTATING GROUPS, MEANS FOR DERIVING A CONTROL FUNCTION VOLTAGE FOR EACH OF THE RECTIFIERS OF SAID CONVERTERS, SAID MEANS COMPRISING FOR EACH RECTIFIER FIRST, SECOND AND THIRD A.C. VOLTAGE SOURCES, MEANS TO FEED SAID A.C. VOLTAGE SOURCES FROM THE COMMUTATION VOLTAGE FOR SUCH RECTIFIER, THAT IS, THE DIFFERENCE BETWEEN THE ANODE VOLTAGES OF A PARTICULAR RECTIFIER AND THE PRECEDING RECTIFIER OF THE SAME COMMUTATION GROUP; SAID FEEDING MEANS COMPRISING TRANSFORMERS AND PHASE SHIFTING MEANS, SAID COMMUTATION VOLTAGE BEING SUBSTANTIALLY A SINUSOIDAL VOLTAGE, SAID FEEDING MEANS FOR THE FIRST AND SECOND OF SAID A.C. VOLTAGE SOURCES INCLUDING MEANS TO TRANSFORM SAID COMMUTATION VOLTAGE INTO COSINUSOIDAL VOLTAGES HAVING THE SAME PHASE DISPLACEMENT AND AMPLITUDE BUT DIFFERENT BASE POTENTIALS, THE THIRD A.C. VOLTAGE HAVING SUCH AMPLITUDE, PHASE DISPLACEMENT AND BASE POTENTIAL AS TO FORM A TRANSITION VOLTAGE BETWEEN SAID FIRST AND SECOND COSINUSOIDAL VOLTAGES
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |