Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2005-12-27
2005-12-27
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S021140
Reexamination Certificate
active
06980441
ABSTRACT:
A control circuit and corresponding method, particularly for power converters in a system having paralleled power converters, for rapidly and efficiently controlling a free-wheeling synchronous rectifier, so as to prevent any large negative current flow that might cause damage to components of the converter during a fault condition where the PWM signal turns off or has missing cycles. Preferably, clock signal and the gate drive output of a PWM controller are compared in order to recognize a failure condition and to rapidly provide control of the synchronous rectifier so as to prevent the large negative current flow. Control of the free-wheeling synchronous rectifier is provided in a way that is dependent on the gate drive output of the PWM controller and independent of timing, current sense signals, voltage sense signals, the current share system, and the operation of the forward synchronous rectifier of the power converter.
REFERENCES:
patent: 4922404 (1990-05-01), Ludwig et al.
patent: 5336985 (1994-08-01), McKenzie
patent: 5402329 (1995-03-01), Wittenbreder, Jr.
patent: 5552695 (1996-09-01), Schwartz
patent: 5636116 (1997-06-01), Milavec et al.
patent: 6100677 (2000-08-01), Farrenkopf
patent: 6128206 (2000-10-01), Sun et al.
patent: 6181578 (2001-01-01), Fronk
patent: 6191964 (2001-02-01), Boylan et al.
patent: 6204648 (2001-03-01), Saeki et al.
patent: 6396333 (2002-05-01), Dubhashi et al.
patent: 6414861 (2002-07-01), Matsumoto et al.
patent: 6430070 (2002-08-01), Shi et al.
patent: 6459600 (2002-10-01), Farrington et al.
patent: 2002/0001204 (2002-01-01), Lentini et al.
Orr, et al., “An Implementation of Synchronous Rectifiers in a Power Converter Designed for use in Parallel Operation”, Power Conversion, pp. 220-231 (Oct. 1990).
Astec International Limited
Coudert Brothers LLP
Han Jessica
LandOfFree
Circuit and method for controlling a synchronous rectifier... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit and method for controlling a synchronous rectifier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for controlling a synchronous rectifier... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3504356