Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1994-04-08
1996-06-18
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 20, 363 89, 327309, H02M 7217
Patent
active
055284825
ABSTRACT:
A synchronous rectifier for use with a clamped-mode power converter uses in one embodiment a hybrid rectifier with a MOSFET rectifying device active in one first cyclic interval of the conduction
onconduction sequence of the power switch and a second rectifying device embodied in one illustrative embodiment as a low voltage bipolar diode rectifying device active during an alternative interval to the first conduction
onconduction interval. The gate drive to the MOSFET device is continuous at a constant level for substantially all of the second interval which enhances efficiency of the rectifier. The bipolar rectifier device may also be embodied as a MOSFET device. The subject rectifier may be used in both forward and flyback power converters.
REFERENCES:
patent: 5066900 (1991-11-01), Bassett
patent: 5126931 (1992-06-01), Jitaru
patent: 5303138 (1994-04-01), Rozman
Principles of Solid-State Power Conversion, Tarter, 1st Ed, (1985), pp. 544-547.
"Current-Controlled Synchronous Rectrification" by B. Acker; C. R. Sullivan S. R. Sanders IEEE pp. 185-191, May 1994.
"High Efficiency DC--DC Converter" by I. D. Jitaru; G. Cocina. IEEE, pp. 638-644. May 1994.
AT&T Corp.
Pacher Eugen E.
Riley Shawn
Wong Peter S.
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