Patent FR2390633A1 successfully refreshed from Google Patents.
US5654879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-output DC/DC power converter
Assignee: Alcatel Lucent SAS
•
Filing: 1995-12-28
•
Granted: 1997-08-05
•
Expires: 2015-12-28
Abstract
Abstract A converter device that transforms an input voltage (VE) into several output voltages (V1, . . . ,VN) includes a transformer (T), a first switching control device (PWM) that generates a first switching control signal (Q1) to control the switching of a first switching element (M1) and thereby regulate a main output of the converter, and a second switching control device (SDCC) that generates a second switching control signal (Q2) which is a function of both the first switching control signal (Q1) and of a second output voltage (V2). This second switching control signal (Q2) controls the switching of a second switching device (SDC) in order to regulate a second output voltage of the converter device.
Inventors
- 👤 Manuel Vazquez Lopez
- 👤 Enrique De La Cruz Moreno
- 👤 Salvador Ollero Velasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:38
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33561; H02M3/33569
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A converter device that transforms an input voltage (VE) into several output voltages (V1, . . . ,VN) comprising a transformer (T) with a primary winding (DP) and a number of secondary windings (DS1, . . . ,DSN), a first switching element (M1) connected in series with said primary winding (DP) constituting a primary circuit and a first switching control device (PWM) which generates a first switching control signal (Q1) to control the switching of said first switching element (M1), further comprising a second switching device (SDC) inserted in the primary circuit, a second switching control device (SDCC) that generates a second switching control signal (Q2) as a function of the first switching control signal (Q1) and of a second output voltage (V2), said second switching control signal (Q2) variably controlling the switching of the second switching device (SDC) by varying an ON state of the second switching device (SDC) when the first switching element (M1) is in an OFF state.
Claim 2
Dependent Claim
161 words
A converter device that transforms an input voltage (VE) into several output voltages (V1, . . . ,VN) comprising a transformer (T) with a primary winding (DP) and a number of secondary windings (DS1, . . . ,DSN), a first switching element (M1) connected in series with said primary winding (DP) constituting a primary circuit and a first switching control device (PWM) which generates a first switching control signal (Q1) to control the switching of said first switching element (M1), further comprising a second switching device (SDC) inserted in the primary circuit, a second switching control device (SDCC) that generates a second switching control signal (Q2) as a function of the first switching control signal (Q1) and of a second output voltage (V2), said second switching control signal (Q2) variably controlling the switching of the second switching device (SDC) by varying an ON state of the second switching device (SDC) when the first switching element (M1) is in an OFF state.
Claim 3
Dependent Claim
26 words
The converter device according to claim 1, wherein the second switching device (SDC) comprises a second switching element (M2) connected in series with a capacitor (C1).
Claim 4
Dependent Claim
78 words
The converter device according to claim 2, wherein the second switching control device (SDCC) comprises a control logic process such that the second switching element (M2) is in a cut-off state (TOFF2) prior to a conducting state (TON1) of the first switching element (M1), remaining in this cut-off state (TOFF2) during the conductive period (TON1) of the first switching element (M1) and enters a conductive period (TON2) after the conductive period (TONI) of the first switching element (M1).
Claim 5
Dependent Claim
31 words
The converter device according to claim 3, wherein the conductive state (TON2) of the second switching element (M2) is less than the cut-off period (TOFF1) of the first switching element (M1).
Claim 6
Dependent Claim
26 words
The converter device according to claim 2, wherein the second switching device (SDC) is connected in parallel with the primary winding (DP) of the transformer (T).
Claim 7
Dependent Claim
23 words
The converter device according to claim 2, wherein the second switching device (SDC) is connected in parallel with the first switching element (M1).
References Cited (Backward Citations)
US4455596A
Cited
DE3912849A1
Cited
EP0474471A2
Cited
US5448465A
Cited
US5544032A
Cited
US5541828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |