US3219905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining artificial commutation of an inverter
Assignee: Brush Electrical Engineering Co Ltd
•
Filing: 1962-09-10
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Granted: 1965-11-23
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Rex M Davis
- 👤 Christopher D Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:02
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN ARTIFICALLY COMMUTATED ELECTRONIC INVERTER FOR CONVERTING DIRECT CURRENT INTO A POLYPHASE ALTERNATING CURRENT, SAID INVERTER INCLUDING AN INVERTER CIRCUIT AND A COMMUTATING CIRCUIT, SAID INVERTER CIRCUIT INCLUDING A PLURALITY OF INVERTER ELEMENTS, EACH INVERTER ELEMENT REQUIRING A REVERSE VOLTAGE TO BE IMPRESSED ON IT IN ORDER TO EXTINGUISH IT, SAID COMMUTATING CIRCUIT COMPRISING A BRIDGE CIRCUIT HAVING FOUR SWITCHING ELEMENTS AND A CAPACITOR WHICH IS CONNECTED BETWEEN TWO OPPOSITE TERMINALS OF THE BRIDGE CIRCUIT, MEANS ADAPTED TO APPLY A CONTROL SIGNAL ALTERNATELY TO EACH PAIR OF DIAGONALLY-OPPOSITE SWITCHING ELEMENTS TO RENDER THEM CONDUCTING WHEREBY TO CAUSE AN
Claim 2
Dependent Claim
98 words
AN ARTIFICALLY COMMUTATED ELECTRONIC INVERTER FOR CONVERTING DIRECT CURRENT INTO A POLYPHASE ALTERNATING CURRENT, SAID INVERTER INCLUDING AN INVERTER CIRCUIT AND A COMMUTATING CIRCUIT, SAID INVERTER CIRCUIT INCLUDING A PLURALITY OF INVERTER ELEMENTS, EACH INVERTER ELEMENT REQUIRING A REVERSE VOLTAGE TO BE IMPRESSED ON IT IN ORDER TO EXTINGUISH IT, SAID COMMUTATING CIRCUIT COMPRISING A BRIDGE CIRCUIT HAVING FOUR SWITCHING ELEMENTS AND A CAPACITOR WHICH IS CONNECTED BETWEEN TWO OPPOSITE TERMINALS OF THE BRIDGE CIRCUIT, MEANS ADAPTED TO APPLY A CONTROL SIGNAL ALTERNATELY TO EACH PAIR OF DIAGONALLY-OPPOSITE SWITCHING ELEMENTS TO RENDER THEM CONDUCTING WHEREBY TO CAUSE AN
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |