US4945462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero-current switching DC to DC full-wave mode converter
Assignee: Individual
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Filing: 1989-01-18
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Granted: 1990-07-31
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Expires: 2009-01-18
Abstract
Abstract A zero-current switching DC to DC full-wave mode converter, having a controllable DC to AC converter including electronic switches for selectively coupling a source of voltage across a primary winding of a power transformer circuit when the current flow through the switches is substantially negligible, AC to DC converter connected to secondary windings of the power transformer circuit, two charging and energy storing circuits each including a storage capacitor connected in series with one of the secondary windings and further including an inductor unit connected in circuit between the input of the DC to AC converter and the storage capacitor and at least one discharging circuit connected across the storage capacitors and being connectable via a first and a second terminal to a load, the discharging circuit including at least one discharging inductor connected between one side of the storage capacitor and the first terminal, wherein the charging period of the storage capacitor is smaller than the discharging period thereof.
Inventors
- 👤 Lev A. Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A zero-current switching DC to DC fullwave mode converter, comprising: a controllable DC to AC converter having an input connectable to a DC source of voltage and including electronic switching means for selectively coupling said DC source of voltage across a primary winding of a power transformer circuit when the current flow through said switching means is substantially negligible; AC to DC converter having an input connected to secondary windings of said power transformer circuit; two charging and energy storing circuits each including a storage capacitor connected in series with one of said secondary windings; an inductor unit connected in circuit in a location between said input of said DC to AC converter and said storage capacitor and, at least one discharging circuit connected across said storage capacitors and being connectable via a first and a second terminal to a load, said discharging circuit including at least one discharging inductor connected between one side of said storage capacitors and said first terminal, wherein the charging period each of said storage capacitors is smaller than the discharging period thereof.
Claim 2
Dependent Claim
178 words
A zero-current switching DC to DC fullwave mode converter, comprising: a controllable DC to AC converter having an input connectable to a DC source of voltage and including electronic switching means for selectively coupling said DC source of voltage across a primary winding of a power transformer circuit when the current flow through said switching means is substantially negligible; AC to DC converter having an input connected to secondary windings of said power transformer circuit; two charging and energy storing circuits each including a storage capacitor connected in series with one of said secondary windings; an inductor unit connected in circuit in a location between said input of said DC to AC converter and said storage capacitor and, at least one discharging circuit connected across said storage capacitors and being connectable via a first and a second terminal to a load, said discharging circuit including at least one discharging inductor connected between one side of said storage capacitors and said first terminal, wherein the charging period each of said storage capacitors is smaller than the discharging period thereof.
Claim 3
Dependent Claim
23 words
The converter as claimed in claim 1 wherein said inductor unit is connected in series with said primary winding of said power transformer.
Claim 4
Dependent Claim
23 words
The converter as claimed in claim 1 wherein said inductor unit is connected in series with said secondary winding of said power transformer.
Claim 5
Dependent Claim
27 words
The converter as claimed in claim 1 wherein said inductor unit is connected between said secondary winding of said power transformer and said AC to DC converter.
Claim 6
Dependent Claim
26 words
The converter as claimed in claim 1 wherein said inductor unit is connected between the input of said AC to DC converter and said charging capacitor.
Claim 7
Dependent Claim
16 words
The converter a claimed in claim 1 wherein said AC to DC converter comprises unidirectional elements.
Claim 8
Dependent Claim
13 words
The converter as claimed in claim 6 wherein said unidirectional elements are diodes.
Claim 9
Dependent Claim
35 words
The converter as claimed in claim 1 wherein said inductor unit includes at least two inductors wound on a common magnetic core, said inductors being connected in circuit between said terminals and said primary winding.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |