Clamped mode DC-DC converter

Details Clamped mode DC-DC converter Clamped mode DC-DC converter

1992-12-16

1994-01-25

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 56, H02M 3335

Patent

active

052821234

ABSTRACT:
A voltage control circuit comprises a transformer (18) having primary (17) and secondary (20, 21) windings, an input coupled to said primary winding, first and second switch devices (11, 12) each coupled to said primary winding of the transformer, and a clamping capacitor (28) coupled to the transformer and at least one of the first and second switches. An output filter (25, 26) is coupled through a rectifier (23, 24) to the secondary winding of the transformer and an output is taken from the output filter. Means comprising a feedback circuit (13, 14, 15) coupled on one side to the output filter and on the other side to control terminals of the first and second switches cause the first and second switches to conduct current alternately. Operation of the circuit is stabilized by including an interconnection (29) of the clamping capacitor to the feedback circuit for generating a signal that modifies the energy applied by the feedback circuit to the control terminals of the first (11) and second (12) switches.

REFERENCES:
patent: 4441146 (1984-04-01), Vinciarelli
patent: 5019957 (1991-05-01), Wilkinson
patent: 5066900 (1991-11-01), Bassett
"Adaptive Input Filter Compensation for Switching Regulators," S. S. Kelkar et al., IEEE Transactions on Aerospace and Electronic Systems, vol. AES-20, No. 1, Jan. 1984, pp. 57-66.
"High Power SMPS Require Intrinsic Reliability," B. Carsten, Powerconversion International Proceedings, Sep. 14-17, 1981, Munich, West Germany, pp. 118-133.
"Constant Frequency, Forward Converter with Resonant Transition," I. Jitaru, High Frequency Power Conversion Proceedings, Jun. 9-14, 1991, Toronto, Ontario, Canada, pp. 282-292.
"Simple PWM-FM Control for an Independently-Regulated Dual Output Converter," A. Dauhajre et al., Proceedings of Powercon 10, Mar. 21-24, 1983, San Diego, Calif. D-3 pp. 1-8.
"A New High Frequency, Zero-Voltage Switched, PWM Converter, " I. D. Jitaru, APEC '92 Proceedings, Feb. 1992, pp. 657-664.
"The Double Converter: A Fully Regulated Two-Output DC-to-DC Converter," J. Sebastian et al., PESC Proceedings, 1985, pp. 117-126.

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