Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1993-07-23
1994-09-27
Voeltz, Emanuel T.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, 315411, 348730, H02M 3335
Patent
active
053511778
ABSTRACT:
A pulse-width modulator controls a switching transistor. The switching transistor is coupled to a primary winding of a chopper transformer. The switching transistor and the primary winding are referenced to a nonisolated ground conductor. To initiate a standby mode of operation, a first on/off control signal that is referenced to an isolated ground conductor disables a horizontal oscillator that is energized from a secondary winding of the chopper transformer and that is also referenced to the isolated ground conductor. As a result, a decrease loading of circuit elements that are referenced to the isolated ground occurs. In the standby mode, current pulses in the primary winding are produced at a substantially higher frequency than in normal operation. A frequency detector referenced to the nonisolated ground generates a second on/off control signal that is referenced to the nonisolated ground in accordance with the frequency of the current pulses in the chopper transformer. In this way, the second on/off control signal is generated without the need for an additional isolation element other than the chopper transformer.
REFERENCES:
patent: 4109307 (1978-08-01), Knoll
patent: 4302717 (1981-11-01), Olla
patent: 4315305 (1982-02-01), Siemon
patent: 4459651 (1984-07-01), Fenter
patent: 4564897 (1986-01-01), Okamoto et al.
patent: 4680511 (1987-07-01), Fitzgerald et al.
patent: 4689730 (1987-08-01), Kimura
patent: 4761723 (1988-08-01), Lendaro
patent: 4766528 (1988-08-01), Marinus
patent: 4788591 (1988-11-01), Decraemer
patent: 4930060 (1990-05-01), Leonardi
patent: 4975592 (1990-12-01), Hahn et al.
patent: 4975823 (1990-12-01), Rilly et al.
patent: 5010281 (1991-04-01), Rodriguez-Cavazos
patent: 5017844 (1991-05-01), Lendaro
patent: 5126930 (1992-06-01), Ahn
patent: 5146394 (1992-09-01), Ishii et al.
patent: 5161241 (1992-11-01), Kanai
patent: 5189600 (1993-02-01), Keck et al.
A publication by Siemens Semiconductor, Industrial ICs, dated Dec. 15, 1989 illustrating a switch mode power supply that includes a transistor T.
A publication entitled Power Supply Controls published by Unitrode Integrated Circuit.
Hening Sammy S.
Laks Joseph J.
RCA Thomson Licensing Corporation
Tripoli Joseph S.
Voeltz Emanuel T.
LandOfFree
Switch mode power supply with standby mode operation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switch mode power supply with standby mode operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switch mode power supply with standby mode operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1269480