US4517636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter apparatus
Assignee: TOKYO SHISAURA DENKI KABUSHIKI
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Filing: 1983-07-08
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Granted: 1985-05-14
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Expires: 2003-07-08
Abstract
Abstract An inverter apparatus includes a plurality of gate-turn-off thyristors being provided at each end of thyristor-branches, and bias sources or capacitors connected in parallel with the gate-turn-off thyristors for applying reverse voltage to the thyristor-branches when the gate-turn-off thyristor is turned off.
Inventors
- 👤 Hiroshi Uchino
- 👤 Kihei Nakajima
- 👤 Ryoichi Kurosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:04
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/5155; H02M7/525
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A D.C. to A.C. inverter apparatus responsive to a D.C. power source comprising: an inverter including thyristor-branches, said inverter being connected across the DC power source; a plurality of gate-turn-off thyristors respectively interposed between the DC power source and each of the thyristor-branches; a load connected to the output terminals of said inverter; gate control means for applying gate turn-off signals to said gate-turn-off thyristors; means for detecting current through the output terminals of said inverter and applying control signals to said gate control means when the detected current is a predetermined value; and means for biasing a reverse voltage to the thyristor-branches when said gate-turn-off thyristor is turned off.
Claim 2
Dependent Claim
110 words
A D.C. to A.C. inverter apparatus responsive to a D.C. power source comprising: an inverter including thyristor-branches, said inverter being connected across the DC power source; a plurality of gate-turn-off thyristors respectively interposed between the DC power source and each of the thyristor-branches; a load connected to the output terminals of said inverter; gate control means for applying gate turn-off signals to said gate-turn-off thyristors; means for detecting current through the output terminals of said inverter and applying control signals to said gate control means when the detected current is a predetermined value; and means for biasing a reverse voltage to the thyristor-branches when said gate-turn-off thyristor is turned off.
Claim 3
Dependent Claim
33 words
The inverter apparatus according to claim 1, wherein said biasing means includes a plurality of capacitors, each of said capacitors being respectively connected in parallel with one of said plurality of gate-turn-off thyristors.
Claim 4
Dependent Claim
31 words
The inverter apparatus according to claim 1, wherein said biasing means includes a plurality of DC bias sources, each being respectively connected across one of said plurality of said gate-turn-off thyristors.
References Cited (Backward Citations)
US3824437A
Cited
SU877783A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |