US4831352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier transformer
Assignee: Mitsubishi Electric Corp
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Filing: 1988-02-23
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Granted: 1989-05-16
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Expires: 2008-02-23
Abstract
Abstract A rectifier transformer for supplying a predetermined alternating current to a rectifier includes: a transformer having secondary windings (cell windings) connected in a double star in such a manner that common terminal side conductors of the secondary windings are individually drawn out; and an interphase reactor having three iron cores, one of which is provided or each individual phase, primary windings formed by passing the conductors connected to two ends of the individual cell windings through the corresponding iron cores, and secondary windings wound around the corresponding iron cores in such a way that they are inductively coupled to the primary windings, the secondary windings being connected to each other in series so as to form a closed circuit.
Inventors
- 👤 Katsuji Sokai
- 👤 Hiromu Shinkai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:34
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/12; H01F27/00; H01F27/40; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/068; H01F27/408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A rectifier transformer for supplying a predetermined alternating current to a rectifier, comprising: a transformer having primary windings, and secondary cell windings connected in a double star in star in such a manner that common terminal side conductors of said secondary windings are individually drawn out; and an interphase reactor having three iron cores, one of which is provided for each individual phase, primary windings formed by passing the conductors connected to two ends of said individual cell windings through the corresponding iron cores, and secondary windings wound around the corresponding iron cores in such a way that they are inductively coupled to said primary windings, said secondary windings being connected to each other in series so as to form a closed circuit.
Claim 2
Dependent Claim
123 words
A rectifier transformer for supplying a predetermined alternating current to a rectifier, comprising: a transformer having primary windings, and secondary cell windings connected in a double star in star in such a manner that common terminal side conductors of said secondary windings are individually drawn out; and an interphase reactor having three iron cores, one of which is provided for each individual phase, primary windings formed by passing the conductors connected to two ends of said individual cell windings through the corresponding iron cores, and secondary windings wound around the corresponding iron cores in such a way that they are inductively coupled to said primary windings, said secondary windings being connected to each other in series so as to form a closed circuit.
Claim 3
Dependent Claim
21 words
A rectifier transformer according to claim 1, wherein said interphase reactor is incorporated in a transformer tank which contains said transformer.
Claim 4
Dependent Claim
21 words
A rectifier transformer according to claim 1, wherein said interphase reactor is provided outside said transformer tank which contains said transformer.
Claim 5
Dependent Claim
23 words
A rectifier transformer according to claim 1, wherein said three iron cores of said interphase reactor are formed as a common iron core.
Claim 6
Dependent Claim
21 words
A rectifier transformer according to claim 4, wherein said interphase reactor is provided within said transformer tank which contains said transformer.
Claim 7
Dependent Claim
21 words
A rectifier transformer according to claim 4, wherein said interphase reactor is provided outside said transformer tank which contains said transformer.
References Cited (Backward Citations)
US1986604A
Cited
JPH06151409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |