US4823249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency resonant power converter
Assignee: Nokia Bell Labs
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Filing: 1987-04-27
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Granted: 1989-04-18
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Expires: 2007-04-27
Abstract
Abstract A high frequency DC to DC converter having at least two phase differentiated pulsed voltage sources, utilizes two phase differentiated unidirectional power flow resonant circuits to permit multiple quasi resonant operation of the converter and thereby gain the benefit of lowered EMI, high efficiency, lowered component stress and increased power throughput.
Inventors
- 👤 II John D. Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/44; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3376; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
195 words
A power converter comprising: input means for accepting a dc voltage source, a power transformer including a primary winding and a secondary winding; a resonating capacitor having first and second access terminals; a first switch for applying the dc voltage source to the primary winding in a first direction; a second switch for applying the dc voltage source to the primary winding in a second direction opposite the first direction; a first secondary resonant circuit connected to a first terminal of the secondary winding and including, a first inductance derived in part from a leakage inductance of the transformer, a first rectifying diode and a connection to the first access terminal of the resonating capacitor; a second secondary resonant circuit connected to a second terminal of the secondary winding and including a second inductance derived in part from a leakage inductance of the transformer, a second rectifying diode and a connection to said first access of the resonating capacitor; the resonating capacitor having resonant operation with both the first and second resonant circuits; and output means connected to the resonating capacitor, having constant current sink characteristics and adapted for accepting a load to be energized.
Claim 2
Dependent Claim
195 words
A power converter comprising: input means for accepting a dc voltage source, a power transformer including a primary winding and a secondary winding; a resonating capacitor having first and second access terminals; a first switch for applying the dc voltage source to the primary winding in a first direction; a second switch for applying the dc voltage source to the primary winding in a second direction opposite the first direction; a first secondary resonant circuit connected to a first terminal of the secondary winding and including, a first inductance derived in part from a leakage inductance of the transformer, a first rectifying diode and a connection to the first access terminal of the resonating capacitor; a second secondary resonant circuit connected to a second terminal of the secondary winding and including a second inductance derived in part from a leakage inductance of the transformer, a second rectifying diode and a connection to said first access of the resonating capacitor; the resonating capacitor having resonant operation with both the first and second resonant circuits; and output means connected to the resonating capacitor, having constant current sink characteristics and adapted for accepting a load to be energized.
Claim 3
Dependent Claim
54 words
A power converter as defined in claim 1 wherein the first and second switch connect a first node of the input means to opposite terminals of the primary winding respectively and a second node of the input means connected to a node of the primary winding intermediate the opposite terminals of the primary winding.
Claim 4
Dependent Claim
32 words
A power converter as defined in claim 1 wherein the first and second switch are connected in a series connection and the series connection being connected in parallel across the input means.
Claim 5
Dependent Claim
52 words
A power converter as defined in claim 1 where the first and second switches are connected in a bridge configuration with a third switch connected in the bridge configuration operating in accord with the first switch and a fourth switch connected in the bridge configuration operating in accord with the second switch.
Claim 6
Dependent Claim
93 words
A power converter as defined in claim 1 and further including regulation control circuitry, comprising: means for sensing an output signal of the load means responsive to the means for sensing for generating an error signal responsive to a deviation of the output signal from a predetermined regulation value, and means for converting the error signal into a frequency, and means responsive to the frequency to generate a driver signal having a fixed interval value and a variable period, and means for alternately applying the drive signal to the first and second switches.
Claim 7
Dependent Claim
103 words
A power converter comprising inverting means for generating first and second voltage pulses in phase opposition to one another, output circuitry including signal shaping circuitry, filter circuitry and output terminals to accept a load, the signal shaping circuitry including first and second resonant circuits, resonant at a switching frequency of the inverting means, each resonant circuit including inductive impedance and a rectifying diode for limiting resonant flow through the inductive impedance to one direction of flow, a common resonant capacitor shared by the first and second resonant circuits and having one of its terminals connected to both the first and second circuits respectively.
Claim 8
Dependent Claim
103 words
A power converter comprising inverting means for generating first and second voltage pulses in phase opposition to one another, output circuitry including signal shaping circuitry, filter circuitry and output terminals to accept a load, the signal shaping circuitry including first and second resonant circuits, resonant at a switching frequency of the inverting means, each resonant circuit including inductive impedance and a rectifying diode for limiting resonant flow through the inductive impedance to one direction of flow, a common resonant capacitor shared by the first and second resonant circuits and having one of its terminals connected to both the first and second circuits respectively.
Claim 9
Dependent Claim
18 words
A power converter as defined in claim 6 wherein the inventing means is embodied in a push-pull configuration.
Claim 10
Dependent Claim
19 words
A power conversion as directed in claim 6 wherein the inventing means is embodied in a half bridge configuration.
Claim 11
Dependent Claim
19 words
A power converter as defined in claim 6 wherein the inventing means is embodied in a full bridge configuration.
References Cited (Backward Citations)
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |