US5086381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
DC-DC converter
Assignee: Yutaka Electric Mfg Co Ltd
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Filing: 1990-10-09
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Granted: 1992-02-04
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Expires: 2010-10-09
Abstract
Abstract A DC-DC converter includes a transformer and a switching element. The primary winding of the transformer and the switching element are connecting in series with a DC power source. A DC output is extracted via a rectifier circuit connected to a secondary winding of the transformer. A capacitor is connected in parallel to the switching element, and a saturable reactor is connected between the secondary winding of the transformer and the rectifier.
Inventors
- 👤 Shigeru Kameyama
- 👤 Koji Arakawa
- 👤 Kazushi Watanabe
- 👤 Hitoshi Yoshioka
- 👤 Isami Norigoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33538
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A DC-DC converter comprising: a transformer having a primary winding and a secondary winding, said primary winding being adapted to be connected in series with a DC power source; a rectifier and smoothing circuit; a switching means, adapted to be connected in series with said DC power source, for connecting said rectifier and smoothing circuit to said secondary winding of said transformer during a time when said switching means is in an on-state; a capacitor connected in parallel with said switching means; and a saturable reactor connected between said secondary winding of said transformer and said rectifier.
Claim 2
Dependent Claim
97 words
A DC-DC converter comprising: a transformer having a primary winding and a secondary winding, said primary winding being adapted to be connected in series with a DC power source; a rectifier and smoothing circuit; a switching means, adapted to be connected in series with said DC power source, for connecting said rectifier and smoothing circuit to said secondary winding of said transformer during a time when said switching means is in an on-state; a capacitor connected in parallel with said switching means; and a saturable reactor connected between said secondary winding of said transformer and said rectifier.
Claim 3
Dependent Claim
16 words
A DC-DC converter according to claim 1, wherein said switching element is an insulated-gate field-effect transistor.
References Cited (Backward Citations)
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Cited
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Cited
US4788634A
Cited
US4857822A
Cited
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Cited
US4931918A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |